Hex socket head cap screw(GOSHO(Gosei(Coarse Steel Unplated 10 X 80 Pitch 1.5

Please contact us if you need to verify the thread section.



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 in most cases used without a nut.
It is also referred to as a cap screw or socket screw.
Spanners and wrenches with jaws for tightening hex bolts require clearance space around the work area, whereas a hex key requires no such space.
For this reason, the use of hex socket head cap screws allows work in confined spaces and enables more compact machine designs.
Due to their appearance, they are also increasingly being used for decorative purposes.

• Hex socket head cap screw Gosei Gosei Coarse pitch
• Nominal diameter M10
• Length under head (ℓ) 80.0
• Pitch 1.5
• Thread section (b) Reference 32
• Head diameter (dk) Max 16.27 Min 15.73
• Neck diameter (da) Max 11.2
• Body diameter (ds) Max 10 Min 9.78
• Head height (k) Max 10 Min 9.64
• Neck fillet (r) Min 0.4
• Hex socket width across flats (s) Nominal 8 Max 8.175 Min 8.025
• Hex socket depth (t) Min 5
• Head chamfer (v) Max 1.0
• Full thread range 40
• Strength class 12.9(M2-M20) 10.9(M22-M24) 10.9(Electro zinc plating)