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Gr8.8 Gr10.9 Gr12.9 High Strength Black External Hexagon Bolt

Standard:Gr8.8/10.9 /12.9

Thread Type: UNC UNF / Full Thread/ Half Thread

Brand: Quanyuan

Material: Carbon Steel

Diameter: M2-M36

Finish: Black

Head Type: Hexagon Head

Drive Type: External Hex

MOQ: 5000pcs

Lead Time: 30 to 60 days


High Strength Black External Hexagon Bolt, also called hex bolts or hex head cap screws, are threaded fasteners with a six-sided head. They are installed with a wrench or a socket. Compared to other fasteners, hex head cap screws provide a larger surface-bearing area for better clamping. Hex bolts are well-suited for OEM applications, construction projects, infrastructure, and other uses that require tight tolerances.

 

Hex Head Screw Threaded Fastener Options

Hex head cap screws with standard thread pitch are available fully threaded to DIN 933 and partially threaded to DIN 931. ISO, JIS, or ASTM styles or property classes may be available by special request. We also offer threaded fasteners and hexagon screws for additional metric component options.

 

Available in a huge range of thread diameters from M2 to M36 as standard, with lengths ranging from 3mm up to 250mm. Optional thread locking patches can also be supplied.

 

Non-standard sizes, materials and finishes are available to order as specials, including small volume manufacture, modifications and custom parts made to drawings.

 

Hex Bolt Class

● DIN: Gr.4.6,4.8,5.6,5.8,8.8,10.9,12.9;

● SAE: Gr.2,5,8;

● ASTM: 307A,307B,A325,A394,A490,A449 etc.

 

Finish

Black oxide or blackening is a conversion coating for ferrous materials, stainless steel, copper and copper based alloys, zinc, powdered metals, and silver solder. It is used to add mild corrosion resistance, for appearance, and to minimize light reflection.

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