Hex socket head cap screw P=3(Coarse Steel Trivalent white(Silver) 4 X 12 Pitch 0.7

This is a bolt with a hexagonal socket in a cylindrical head. Tightening is performed using a hex key (Allen wrench).
In most cases, it is used without a nut. It is also known as a cap screw or socket screw.
When fastening a hex bolt, a wrench requires working space, whereas a hex key does not.

Cap Bolt　
Hex Socket Head Cap Screw Encyclopedia
Cap Bolt　P=3

• Hex socket head cap screw P=3 Coarse pitch
• P=3 (With spring washer+JIS flat washer)
• Nominal thread diameter M4
• Length under head (L) 12.0
• Coarse pitch 0.7
• Head diameter (dk) Nominal 7 Max 7.22 Min 6.78
• Head height (k) Nominal 4 Min 3.82
• Hex socket width across flats (s) Nominal 3 Max 3.08 Min 3.02
• Hex socket depth (t) Min 2
• Flat washer (D x t) 10 x 0.8
• Spring washer (d) Max 7
• Spring washer (b x t) 1.4 x 1.0
• Incomplete thread section Max 4.0
• Partial thread range L55 or more
• Partial thread section Thread length 40-44
• * Full thread section Thread length = L dimension - Incomplete thread length