Hex socket head cap screw I=3(Okai(Coarse Steel Zinc plated(Silver) 5 X 15 Pitch 0.8

A bolt with a cylindrical head featuring a hexagonal socket. Tightening is performed using a hex key (Allen wrench). In most cases, they are used without a nut. They are also known as cap screws or socket screws. When fastening hex bolts, a wrench requires working clearance, whereas a hex key does not.

Cap Bolt

• Hex socket head cap screw Type I=3 Okai Coarse pitch
• Nominal thread diameter M5
• Length under head (ℓ) 15.0
• Pitch 0.8
• Head diameter (dk) Nominal 8.5 Max 8.72 Min 8.28
• Head height (k) Nominal 5 Min 4.82
• Hex socket width across flats (s) Nominal 4 Min 4.02
• Hex socket depth (t) Min 2.5
• Flat washer outer diameter x thickness (D1xT) 10x1.0
• Spring washer outer diameter (d1) Max 8.5