Hex socket head cap screw(TKS(Tokosha(Coarse Steel Zinc plated(Silver) 10 X 20 Pitch 1.5

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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 most commonly used without a mating nut.
It is also known as a cap screw or socket screw.
Spanners and wrenches with jaws used to tighten hex bolts require clearance space around the work area, whereas a hex key requires no such clearance.
As a result, 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 design-oriented applications.

• Hex socket head cap screw TKS Tokosha Coarse pitch
• Nominal diameter (d) M10
• Length under head (l) 20.0
• Pitch (P) 1.5
• 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 Min 9.78
• Head height (k) Max Nominal 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
• l dimension full thread range 40
• * Max(1) Maximum diameter without knurling Max(2) Maximum diameter with knurling