Hex socket head cap screw(Nissan Neji(Coarse Steel Trivalent white(Silver) 10 X 50 Pitch 1.5

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This is a bolt with a cylindrical head featuring a hexagonal socket.
A hex key (Allen wrench) is used for tightening. Although classified as a bolt, it is most commonly used without a nut.
It is also known as a cap screw or socket screw.
Jaw spanners and wrenches used to tighten 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 enables work in confined spaces and contributes to the miniaturization of machinery.
Their appearance has also led to increasing use in decorative applications.
Cap Bolt　

• Hex socket head cap screw Nissan Neji Coarse
• Nominal diameter (d) M10
• Length under head (ℓ) 50.0
• Pitch (P) 1.5
• Thread length (b) Reference 32
• Head diameter (dk) Max(1) Nominal 16 Max(2) 16.27 Min 15.73
• Neck diameter (da) Max 11.2
• Body diameter (ds) Max Nominal 10.00 Min 9.78
• Head height (k) Max Nominal 10.00 Min 9.64
• Neck fillet (r) Min 0.4
• Hex socket width across flats (s) Nominal 8.0 Max 8.175 Min 8.025
• Hex socket depth (t) Min 5
• Head chamfer (v) Max 1.0
• *(1) Applies to heads without knurling.
• (2) Applies to heads with knurling.