22 Top Screw Heads

 

10 x 58 Deep  Coarse Thread Phillips Pan Head Screws Black Phosphate 100 Pack

#10 x 5/8″ Deep / Coarse Thread Phillips Pan Head Screws Black Phosphate, 100 Pack

#10 x 5/8″ Deep / Coarse Thread Phillips Pan Head Screws Black Phosphate, 100 Pack - Length 5/8″. Diameter #10. Used for a variety of black hardware, where the screw head sits on top of the surface. Official rok / rok hardware product. Drive phillips #2.

 

Spax 4191020400326 8 x 1-14 T-Star Yellow Zinc Flat Head Wood Screw 1 lb Box

Spax 4191020400326 #8 x 1-1/4″ T-Star Yellow Zinc Flat Head Wood Screw (1 lb Box)

Spax 4191020400326 #8 x 1-1/4″ T-Star Yellow Zinc Flat Head Wood Screw (1 lb Box) - Check out our threads our patented thread technology allows the screw to be driven faster, is easier to install, and reduces splitting in wood let spax take some of the hassle out of your next project. Patented multihead countersinks the screw head flush in wood keep a smooth surface on your project for greater design and functional qualities. T-star plus head provides superior bit engagement better bit engagement means quicker installation with less effort. This superior wood construction screw is coated with yellow zinc to protect the screw so your interior project will last. No required pre-drilling in wood be more efficient on the job by eliminating time consuming steps with self drilling spax.

 

8-32 x 12 Button Head Socket Cap Screws Allen Socket Drive Black Oxide Alloy Steel Fully Threaded Machine Thread Quantity 100

8-32 x 1/2″ Button Head Socket Cap Screws, Allen Socket Drive, Black Oxide, Alloy Steel, Fully Threaded, Machine Thread, Quantity 100

8-32 x 1/2″ Button Head Socket Cap Screws, Allen Socket Drive, Black Oxide, Alloy Steel, Fully Threaded, Machine Thread, Quantity 100 - . This means that the black oxide is not deposited on the surface of the substrate like nickel or zinc electroplating. The black oxide process is a chemical conversion coating. The socket head enables driving where there is not sufficient space for wrenches or sockets. These oxidizing salts include penetrates, catalysts, activators and proprietary additives which all take part in the chemical reaction. Fastenere button head socket cap screws button head socket cap screws are commonly used in machine parts, die fixturing, and clamping. The result of this chemical reaction is the formation of black iron oxide, magnetite (fe3o4), on the surface of the metal being coated. Black oxide has a range of unique properties and benefits that can be applied to a variety of industries. Button socket cap screws offer a wider bearing surface and high tensile strength but are still low profile like other socket cap screws. Black oxide, blackening, oxidizing, oxiding, black passivating, gun bluing. The reaction between the iron of the ferrous alloy and the hot oxide bath produces a magnitite (fe3 o4) on the actual surface of the part. Black oxide is a conversion coating formed by a chemical reaction produced when parts are immersed in the alkaline aqueous salt solution operated at approximately 285 degrees f. These terms all refer to the process of forming a black iron oxide on the surface of ferrous metals. Instead, the black oxide coating is produced by a chemical reaction between the iron on the surface of the ferrous metal and the oxidizing salts present in the black oxide solution.

 

10-24 x 12 Button Head Socket Cap Screws Allen Socket Drive Black Oxide Alloy Steel Fully Threaded Machine Thread Quantity 100

10-24 x 1/2″ Button Head Socket Cap Screws, Allen Socket Drive, Black Oxide, Alloy Steel, Fully Threaded, Machine Thread, Quantity 100

10-24 x 1/2″ Button Head Socket Cap Screws, Allen Socket Drive, Black Oxide, Alloy Steel, Fully Threaded, Machine Thread, Quantity 100 - These oxidizing salts include penetrates, catalysts, activators and proprietary additives which all take part in the chemical reaction. Instead, the black oxide coating is produced by a chemical reaction between the iron on the surface of the ferrous metal and the oxidizing salts present in the black oxide solution. This means that the black oxide is not deposited on the surface of the substrate like nickel or zinc electroplating. Black oxide is a conversion coating formed by a chemical reaction produced when parts are immersed in the alkaline aqueous salt solution operated at approximately 285 degrees f. The socket head enables driving where there is not sufficient space for wrenches or sockets. The reaction between the iron of the ferrous alloy and the hot oxide bath produces a magnitite (fe3 o4) on the actual surface of the part. Black oxide has a range of unique properties and benefits that can be applied to a variety of industries. These terms all refer to the process of forming a black iron oxide on the surface of ferrous metals. Fastenere button head socket cap screws button head socket cap screws are commonly used in machine parts, die fixturing, and clamping. Button socket cap screws offer a wider bearing surface and high tensile strength but are still low profile like other socket cap screws. The black oxide process is a chemical conversion coating. Black oxide, blackening, oxidizing, oxiding, black passivating, gun bluing. The result of this chemical reaction is the formation of black iron oxide, magnetite (fe3o4), on the surface of the metal being coated.

 

meizhouer 6PCSbag Electricians Screwdriver Set Tool Electrical Fully Insulated High Voltage Multi Screw Head Type

meizhouer 6PCS/bag Electricians Screwdriver Set Tool Electrical Fully Insulated High Voltage Multi Screw Head Type

meizhouer 6PCS/bag Electricians Screwdriver Set Tool Electrical Fully Insulated High Voltage Multi Screw Head Type - Ergonomic handle for reduced hand fatigue in use package include6 x electricians screwdrivers. Blackened magnetic blade tip package include6 x electricians screwdrivers. Insulated to 1000v for electrical use package include6 x electricians screwdrivers. Symbol of type on the end of each screwdriver for easy tip identification package include6 x electricians screwdrivers. High quality chrome molybdenum steel shaft package include6 x electricians screwdrivers.

 

10 x 1-58 Reamer Tek TorxStar Head Self-Drilling Wood to Metal Screws - 1 Pound ~113 Tek Screws - Tek Screws for Flatbeds Trailers or where Fastening Wood to Steel - T-25 Torx Screw Head

#10 x 1-5/8″ Reamer Tek Torx/Star Head Self-Drilling Wood to Metal Screws – 1 Pound (~113 Tek Screws) – Tek Screws for Flatbeds, Trailers, or where Fastening Wood to Steel – T-25 Torx Screw Head

#10 x 1-5/8″ Reamer Tek Torx/Star Head Self-Drilling Wood to Metal Screws – 1 Pound (~113 Tek Screws) – Tek Screws for Flatbeds, Trailers, or where Fastening Wood to Steel – T-25 Torx Screw Head - Wood reamer tek screws wings break off after going through the wood and contacting the steel. Torx/star drive countersinking screw head is neat and clean & holds material in place securely. Reamer tek wood-to-steel screws are zinc coated, torx/star head for easy installation. 1 pound quantity has approximately 113 tek screws) use torx/star drive t-25 torx screw bit. No pre-drilling when used with wood thickness of up to 7/8″ and mild steel thickness of 1/8″.

 

6-32 x 38 Button Head Socket Cap Screws Allen Socket Drive Black Oxide Alloy Steel Fully Threaded Machine Thread Quantity 100

6-32 x 3/8″ Button Head Socket Cap Screws, Allen Socket Drive, Black Oxide, Alloy Steel, Fully Threaded, Machine Thread, Quantity 100

6-32 x 3/8″ Button Head Socket Cap Screws, Allen Socket Drive, Black Oxide, Alloy Steel, Fully Threaded, Machine Thread, Quantity 100 - This means that the black oxide is not deposited on the surface of the substrate like nickel or zinc electroplating. Black oxide is a conversion coating formed by a chemical reaction produced when parts are immersed in the alkaline aqueous salt solution operated at approximately 285 degrees f. Instead, the black oxide coating is produced by a chemical reaction between the iron on the surface of the ferrous metal and the oxidizing salts present in the black oxide solution. Black oxide has a range of unique properties and benefits that can be applied to a variety of industries. Black oxide, blackening, oxidizing, oxiding, black passivating, gun bluing. Button socket cap screws offer a wider bearing surface and high tensile strength but are still low profile like other socket cap screws. The socket head enables driving where there is not sufficient space for wrenches or sockets. Fastenere button head socket cap screws button head socket cap screws are commonly used in machine parts, die fixturing, and clamping. The black oxide process is a chemical conversion coating. These oxidizing salts include penetrates, catalysts, activators and proprietary additives which all take part in the chemical reaction. The result of this chemical reaction is the formation of black iron oxide, magnetite (fe3o4), on the surface of the metal being coated. These terms all refer to the process of forming a black iron oxide on the surface of ferrous metals. The reaction between the iron of the ferrous alloy and the hot oxide bath produces a magnitite (fe3 o4) on the actual surface of the part.

 

Haobase 180Pcs DIN912 M25 Hex socket head cap screw kit set grad129 m25 x 45681012141620

Haobase 180Pcs DIN912 M2.5 Hex socket head cap screw kit set grad12.9 m2.5 x 4/5/6/8/10/12/14/16./20

Haobase 180Pcs DIN912 M2.5 Hex socket head cap screw kit set grad12.9 m2.5 x 4/5/6/8/10/12/14/16./20 - Din912 m2 cap head hexagon socket screw kit. Highest quality, competitors cant compete with our triple guarantee. Made from hss 4341#, the hardness is 62-63hrc. Your damaged screw remover set is backed by our highest quality promise. The 4 piece screw extractor set works with any drill and any screw size or bolt.

 

uxcell M3x10mm 316 Stainless Steel Phillips Pan Head Machine Screws Fasteners 50 Pcs

uxcell M3x10mm 316 Stainless Steel Phillips Pan Head Machine Screws Fasteners 50 Pcs

uxcell M3x10mm 316 Stainless Steel Phillips Pan Head Machine Screws Fasteners 50 Pcs - Bit driver size 32mm / 013″ drive type phillips fastener type machine screw. Head style pan head material 316 stainless steel package content 50(+/-2%) x phillips pan head machine screws. Thread style fully thread head size 56mm x 25mm / 022″ x 01″ (d t). Main color silver tone thread pitch 05mm total length 125mm / 049″. Product name phillips pan head machine screw thread size m3 x 10mm / 012″ x 04″ (d l) weight 39g.

 

Spax 4281020400506 8 x 2 T-Star Yellow Zinc Wafer Head Cabinet Screw 1 lb Box

Spax 4281020400506 #8 x 2″ T-Star Yellow Zinc Wafer Head Cabinet Screw (1 lb Box)

Spax 4281020400506 #8 x 2″ T-Star Yellow Zinc Wafer Head Cabinet Screw (1 lb Box) - Heat treated grade 5 durability subjecting the screw to heat treating gives greater strength and reduces breakage. No required pre-drilling in wood be more efficient on the job by eliminating time consuming steps with self drilling spax. Ideal for the installation of fine cabinetry and where a flush or countersunk installation is not possible or desired. Check out our threads our patented thread technology allows the screw to be driven faster, is easier to install, and reduces splitting in wood let spax take some of the hassle out of your next project. Patented multihead countersinks the screw head flush in wood keep a smooth surface on your project for greater design and functional qualities.

 

eBoot Wood Screws Stainless Steel Pan Head Screws Phillips Drive Self-drilling Screws 3 Sizes 150 Pieces

eBoot Wood Screws Stainless Steel Pan Head Screws Phillips Drive Self-drilling Screws, 3 Sizes, 150 Pieces

eBoot Wood Screws Stainless Steel Pan Head Screws Phillips Drive Self-drilling Screws, 3 Sizes, 150 Pieces - Functional wood screws pan head screws with good holding power fit for many woodworking and diy jobs, fasteners for the furniture and cabinet industry. Various sizes 3 different spesfications screws and lengths of wood screws allow you to find proper sizes for diy projects and woodworking jobs. Deep thread for firmly holding the course thread wood screws with deep thread design provides good holding power in different woods and man-made materials, do not strip easily. Durable and corrosion resistant phillips pan head screws are made of stainless steel, secured and sturdy, resists corrosion for a long time use. Pan head wood screws 3 sizes of the screws are #8 x 1/ 2 inch, #8 x 3/ 4 inch, #8 x 1 1/4 inch (50 pieces each size), with cross slot and pan head, 150 pieces in total.

 

8 x 1 Flat Head Sheet Metal Screws Square Drive Stainless Steel 18-8 Full Thread Bright Finish Self-tapping Quantity 100

#8 x 1″ Flat Head Sheet Metal Screws, Square Drive, Stainless Steel 18-8, Full Thread, Bright Finish, Self-tapping, Quantity 100

#8 x 1″ Flat Head Sheet Metal Screws, Square Drive, Stainless Steel 18-8, Full Thread, Bright Finish, Self-tapping, Quantity 100 - Sheet metal screws have sharp threads that cut into a material such as sheet metal, plastic or wood. These flat head sheet metal screws feature a robertson drive, also known as a square, or scrulox drive which has a square shaped socket in the screw head for high torque and minimal slippage. Flat head has a flat top and a taper. They also make excellent fasteners for attaching metal hardware to wood because the fully threaded shank provides good retention in wood. Flat heads are designed to be used in a countersunk hole.

 

Neiko 50484A HexAllen Head Socket Screw Assortment Steel  200-Piece Set

Neiko 50484A Hex/Allen Head Socket Screw Assortment, Steel | 200-Piece Set

Neiko 50484A Hex/Allen Head Socket Screw Assortment, Steel | 200-Piece Set - 200-piece set of headless hex screws. Coarse & fine threads includes fine threads in 3 sizes
and coarse threads in 9 sizes. Includes case this set includes a hard plastic case with organization chart on inside lid for easy identification. Easily replace a lost screw includes common sizes that eliminate the fear of dropping and losing a screw so you can concentrate on the task at hand. Steel construction made of steel construction that won’t strip out as easily as plastic or aluminum.

 

10-24 x 34 Button Head Socket Cap Screws Allen Socket Drive Black Oxide Alloy Steel Fully Threaded Machine Thread Quantity 100

10-24 x 3/4″ Button Head Socket Cap Screws, Allen Socket Drive, Black Oxide, Alloy Steel, Fully Threaded, Machine Thread, Quantity 100

10-24 x 3/4″ Button Head Socket Cap Screws, Allen Socket Drive, Black Oxide, Alloy Steel, Fully Threaded, Machine Thread, Quantity 100 - Button socket cap screws offer a wider bearing surface and high tensile strength but are still low profile like other socket cap screws. The socket head enables driving where there is not sufficient space for wrenches or sockets. This means that the black oxide is not deposited on the surface of the substrate like nickel or zinc electroplating. Black oxide, blackening, oxidizing, oxiding, black passivating, gun bluing. Black oxide is a conversion coating formed by a chemical reaction produced when parts are immersed in the alkaline aqueous salt solution operated at approximately 285 degrees f. The black oxide process is a chemical conversion coating. These terms all refer to the process of forming a black iron oxide on the surface of ferrous metals. These oxidizing salts include penetrates, catalysts, activators and proprietary additives which all take part in the chemical reaction. . Black oxide has a range of unique properties and benefits that can be applied to a variety of industries. The reaction between the iron of the ferrous alloy and the hot oxide bath produces a magnitite (fe3 o4) on the actual surface of the part. Instead, the black oxide coating is produced by a chemical reaction between the iron on the surface of the ferrous metal and the oxidizing salts present in the black oxide solution. Fastenere button head socket cap screws button head socket cap screws are commonly used in machine parts, die fixturing, and clamping. The result of this chemical reaction is the formation of black iron oxide, magnetite (fe3o4), on the surface of the metal being coated.

 

4-40 Phillips Pan Head Machine Screws Assortment KitStainless Steel

#4-40 Phillips Pan Head Machine Screws Assortment Kit,Stainless Steel

#4-40 Phillips Pan Head Machine Screws Assortment Kit,Stainless Steel - 112inchthread pitch 40 per inch (coarse)head diameter 0. We carry stainless,steel, brass and plated machine screws. 86mm) 0. Thread diameter (#4)(2. 45mm)head height 0. We have many different head and drive styles to choose from pan phillips, flat phillips and many miniature machine screws, hex head machine screws and many more. 215inch(5. 068inchthread direction right handmaterial stainless steelphillip drive size #1kit contains#4-40×3/16 15-piece#4-40×1/4 15-piece#4-40×5/16 15-piece#4-40×3/8 15-piece#4-40×1/2 15-piece#4-40×5/8 15-piece#4-40×3/4 15-piece#4-40×7/8 15-piece#4-40×1″ 15-piece#4-40×1-1/2 10-piece. If you need machine screws that can visit on our amazon store. Machine screws from fastener express are very high quality and we have them in stock and ready to shipping.

 

100 Pack of Rok Hardware 8 x 1-14 Coarse Deep Thread Truss Head Drawer Front Adjustment Phillips Screws

100 Pack of Rok Hardware #8 x 1-1/4″ Coarse Deep Thread Truss Head Drawer Front Adjustment Phillips Screws

100 Pack of Rok Hardware #8 x 1-1/4″ Coarse Deep Thread Truss Head Drawer Front Adjustment Phillips Screws - Has very strong holding power diameter #8 length 1-1/4″ drive phillips head modified truss finish zinc quantity per package 100. Attach the drawer front to the drawer, tighten enough to keep in place. Close the drawer and then align it. The oversized screw head will allow for movement around a 5/16″ adjusting hole. Perfect for aligning drawer fronts. The screw is half-threaded to ensure that thread engagement is in drawer front only.

 

516-18 x 1-14 Button Head Socket Cap Screws Allen Socket Drive Black Oxide Alloy Steel Fully Threaded Machine Thread Quantity 25

5/16-18 x 1-1/4″ Button Head Socket Cap Screws, Allen Socket Drive, Black Oxide, Alloy Steel, Fully Threaded, Machine Thread, Quantity 25

5/16-18 x 1-1/4″ Button Head Socket Cap Screws, Allen Socket Drive, Black Oxide, Alloy Steel, Fully Threaded, Machine Thread, Quantity 25 - Button socket cap screws offer a wider bearing surface and high tensile strength but are still low profile like other socket cap screws. Fastenere button head socket cap screws button head socket cap screws are commonly used in machine parts, die fixturing, and clamping. Black oxide, blackening, oxidizing, oxiding, black passivating, gun bluing. This means that the black oxide is not deposited on the surface of the substrate like nickel or zinc electroplating. The reaction between the iron of the ferrous alloy and the hot oxide bath produces a magnitite (fe3 o4) on the actual surface of the part. The black oxide process is a chemical conversion coating. . The result of this chemical reaction is the formation of black iron oxide, magnetite (fe3o4), on the surface of the metal being coated. These terms all refer to the process of forming a black iron oxide on the surface of ferrous metals. These oxidizing salts include penetrates, catalysts, activators and proprietary additives which all take part in the chemical reaction. Black oxide is a conversion coating formed by a chemical reaction produced when parts are immersed in the alkaline aqueous salt solution operated at approximately 285 degrees f. The socket head enables driving where there is not sufficient space for wrenches or sockets. Instead, the black oxide coating is produced by a chemical reaction between the iron on the surface of the ferrous metal and the oxidizing salts present in the black oxide solution. Black oxide has a range of unique properties and benefits that can be applied to a variety of industries.

 

Metal ROOFING SCREWS 250 Screws x 3 ZINC Hex Washer Head Sheet Metal Roof Screw Self startingself tapping metal to wood sheet metal roofing siding screws ~ EPDM washer Metal Roof screw with colored head ~For corrugated roofing

Metal ROOFING SCREWS: (250) Screws x 3″ ZINC Hex Washer Head Sheet Metal Roof Screw. Self starting/self tapping metal to wood, sheet metal roofing siding screws ~ EPDM washer. Metal Roof screw with colored head ~For corrugated roofing

Metal ROOFING SCREWS: (250) Screws x 3″ ZINC Hex Washer Head Sheet Metal Roof Screw. Self starting/self tapping metal to wood, sheet metal roofing siding screws ~ EPDM washer. Metal Roof screw with colored head ~For corrugated roofing - The color on the roof screw heads is zinc gray and is a zinc coating to help weather the storms through the years. The epdm washer seal will keep the weather out through the years. These metal-to-wood screws are great sheet metal roofing screws to use on any metal roofing or siding project where 3″ roofing screws are needed installing roofing on a house, porch, airplane hangar, shed, pole barn, shop, barn, lean-to, and much more roofing screw color match zinc is gray and will go well with lots of different gray colored or galvanized or other colors of roofing sheet metal depending on the application and personal preference. Zinc x 3″ long sheet metal roofing screws with hex washer head. These self starting roofing screws help take the headache out of sheet metal roof and siding installation. Generally buying zinc coated screws is a result of wanting a long lasting but low cost roofing screw”.

 

EXTRA LONG TORX BIT T15 6 Torx Bit 6 inch long with 14 Quick-Change Shank Star Bit Driver-- A TORX BIT  Star Driver made of industrial-grade hardened tempered tool steel grips torx screw head and reduces cam-out Extra Long Reach Torx Bit

EXTRA LONG TORX BIT: T15 6″ Torx Bit (6 inch long) with 1/4″ Quick-Change Shank (Star Bit Driver)– A TORX BIT / Star Driver made of industrial-grade hardened, tempered tool steel grips torx screw head and reduces cam-out. Extra Long Reach Torx Bit.

EXTRA LONG TORX BIT: T15 6″ Torx Bit (6 inch long) with 1/4″ Quick-Change Shank (Star Bit Driver)– A TORX BIT / Star Driver made of industrial-grade hardened, tempered tool steel grips torx screw head and reduces cam-out. Extra Long Reach Torx Bit. - Heavy duty, industrial grade, hardened and tempered tool steel to last. Great for reaching into tight places. Extra long torx bit t15. 1/4″ quick change shank works with adapters. Torx bit/ star drive grips screw head reducing cam-out and making it easier not to drop screw.

 

175-Pack Small Wood Screw Assortment Kit Phillips Deep Thread Screws Flat and Pan Heads Zinc plated High Value

175-Pack Small Wood Screw Assortment Kit, Phillips, Deep Thread Screws, Flat and Pan Heads, Zinc plated, High Value.

175-Pack Small Wood Screw Assortment Kit, Phillips, Deep Thread Screws, Flat and Pan Heads, Zinc plated, High Value. - Handy small wood screw assortment of commonly used sizes, flat and pan heads, phillips drive, flat head with phillips drive. Great kit for home or workplace, comes in a handy plastic container fits neatly in kitchen and office drawers, hardware and craft cabinet. Screw head countersinks the head flush in wood, to keep a smooth surface for greater design and functional qualities. Kit contains pan head #8 x 1 ¼ inch (15), #8 x 1 inch (17), #6 x 3/4 inch (27), flat head #10 x 1 ¼ inch (9), #10 x 1 inch (12), #10 x ¾ inch (23), #8 x ¾ inch (27), #6 x ¾ inch (45), 175 piecesscrew head countersinks the head flush in wood, to keep a smooth surface for greater design and functional qualities. Enjoy a variety of screws and sizes to suit your needs for different projects, high value combo pack, steel construction zinc-plated.

 

Spax 4191020500906 10 x 3-12 T-Star Yellow Zinc Flat Head Wood Screw 1 lb Box

Spax 4191020500906 #10 x 3-1/2″ T-Star Yellow Zinc Flat Head Wood Screw (1 lb Box)

Spax 4191020500906 #10 x 3-1/2″ T-Star Yellow Zinc Flat Head Wood Screw (1 lb Box) - Patented multihead countersinks the screw head flush in wood keep a smooth surface on your project for greater design and functional qualities. No required pre-drilling in wood be more efficient on the job by eliminating time consuming steps with self drilling spax. Check out our threads our patented thread technology allows the screw to be driven faster, is easier to install, and reduces splitting in wood let spax take some of the hassle out of your next project. T-star plus head provides superior bit engagement better bit engagement means quicker installation with less effort. This superior wood construction screw is coated with yellow zinc to protect the screw so your interior project will last.

 

14-20 x 12 Button Head Socket Cap Screws Allen Socket Drive Black Oxide Alloy Steel Fully Threaded Machine Thread Quantity 50

1/4-20 x 1/2″ Button Head Socket Cap Screws, Allen Socket Drive, Black Oxide, Alloy Steel, Fully Threaded, Machine Thread, Quantity 50

1/4-20 x 1/2″ Button Head Socket Cap Screws, Allen Socket Drive, Black Oxide, Alloy Steel, Fully Threaded, Machine Thread, Quantity 50 - These oxidizing salts include penetrates, catalysts, activators and proprietary additives which all take part in the chemical reaction. Instead, the black oxide coating is produced by a chemical reaction between the iron on the surface of the ferrous metal and the oxidizing salts present in the black oxide solution. Black oxide is a conversion coating formed by a chemical reaction produced when parts are immersed in the alkaline aqueous salt solution operated at approximately 285 degrees f. The result of this chemical reaction is the formation of black iron oxide, magnetite (fe3o4), on the surface of the metal being coated. Fastenere button head socket cap screws button head socket cap screws are commonly used in machine parts, die fixturing, and clamping. The socket head enables driving where there is not sufficient space for wrenches or sockets. The reaction between the iron of the ferrous alloy and the hot oxide bath produces a magnitite (fe3 o4) on the actual surface of the part. Black oxide, blackening, oxidizing, oxiding, black passivating, gun bluing. The black oxide process is a chemical conversion coating. This means that the black oxide is not deposited on the surface of the substrate like nickel or zinc electroplating. . Black oxide has a range of unique properties and benefits that can be applied to a variety of industries. Button socket cap screws offer a wider bearing surface and high tensile strength but are still low profile like other socket cap screws. These terms all refer to the process of forming a black iron oxide on the surface of ferrous metals.