Hex socket head cap screw(TKS(Tokosha(Coarse Steel Unplated 2 X 6

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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) M2
• Length under head (ℓ) 6.0
• Pitch (P) 0.4
• Head diameter (dk) Max(1) Nominal 3.8 Max(2) 3.98 Min 3.62
• Neck diameter (da) Max 2.6
• Body diameter (ds) Max Nominal 2 Min 1.86
• Head height (k) Max Nominal 2 Min 1.86
• Neck fillet (r) Min 0.1
• Hex socket width across flats (s) Nominal 1.5 Max 1.58 Min 1.52
• Hex socket depth (t) Min 1
• Head chamfer (v) Max 0.2
• ℓ dimension full thread range 25
• * Max(1) Maximum diameter without knurling Max(2) Maximum diameter with knurling