Carbon Steel Hexagon Allen Hex Socket Cup Head Bolt

These hex socket head machine screws are UNC threads, full thread, and very smooth, sharp, and accurate. Uniform force, located in the center of the head with no offset, not easy to slip.

Available in a huge range of thread diameters from M1.4 to M12 as standard. 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 Socket 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.

Application

Suitable for indoor and outdoor, such as machinery electronics, instruments and instrument industries, furniture, office equipment, construction, cars, bicycles, 3D printing projects, communication equipment, and ship assembly

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

Black-oxide steel screws are mildly corrosion resistant in dry environments. Zinc-plated steel screws resist corrosion in wet environments. The screws with a blue-dyed finish are easy to distinguish. Zinc-flake-coated steel screws are 20 times as corrosion resistant as zinc-plated screws and comparable to Dacromet-coated screws.