Hex socket head cap screw(GOSHO(Gosei(Coarse Steel Unplated 16 X 75 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
• Nominal diameter M16
• Length under head (ℓ) 75.0
• Pitch 2.0
• Thread length (b) Reference 44
• Head diameter (dk) Max 24.33 Min 23.67
• Neck diameter (da) Max 17.7
• Body diameter (ds) Max 16 Min 15.73
• Head height (k) Max 16 Min 15.57
• Neck fillet (r) Min 0.6
• Hex socket width across flats (s) Nominal 14 Max 14.212 Min 14.032
• Hex socket depth (t) Min 8
• Head chamfer (v) Max 1.6
• Full thread range 60
• Strength class 12.9 (M2-M20) 10.9 (M22-M24) 10.9 (Electro zinc plating)