Hex socket head cap screw(GOSHO(Gosei(Coarse Steel Unplated 14 X 80 Pitch 2.0

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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 M14
• Length under head (ℓ) 80.0
• Pitch 2.0
• Thread section (b) Reference 40
• Head diameter (dk) Max 21.33 Min 20.67
• Neck diameter (da) Max 15.7
• Body diameter (ds) Max 14 Min 13.73
• Head height (k) Max 14 Min 13.57
• Neck fillet (r) Min 0.6
• Hex socket width across flats (s) Nominal 12 Max 12.212 Min 12.032
• Hex socket depth (t) Min 7
• Head chamfer (v) Max 1.4
• Full thread range 55
• Strength class 12.9 (M2-M20) 10.9 (M22-M24) 10.9 (Electro zinc plating)