Hex socket head cap screw(Nihon Byora(Coarse Steel Unplated 12 X 50 Pitch 1.75

This is a bolt with a cylindrical head featuring a hexagonal socket.
Tightening is performed using a hex key (Allen wrench). Although classified as a bolt, it is most commonly used without a nut.
It is also known as a cap screw or socket screw. Unlike open-end spanners or wrenches used to tighten hex bolts, which require clearance space around the fastener, a hex key requires no such surrounding space.
For this reason, the use of hex socket head cap screws enables work in confined spaces and contributes to the miniaturization of machinery.
Their appearance has also led to their increasing use for decorative and design purposes.

• Hex socket head cap screw Nihon Byora Coarse pitch
• Nominal diameter (d) M12
• Length under head (ℓ) 50.0
• Pitch (P) 1.75
• Thread length (b) Reference 38
• Head diameter (dk) Max 18.27 Min 17.73
• Neck diameter (da) Max 13.7
• Body diameter (ds) Max 12.00 Min 11.73
• Head height (k) Max 12.00 Min 11.57
• Under-head fillet (r) Min 0.6
• Hex socket width across flats (S) Nominal 10.0 Max 10.175 Min 10.025
• Hex socket depth (t) Min 6
• Head chamfer (v) Max 1.2