Hex socket head cap screw(KishiwadaStainless steel(Coarse Stainless steel Unplated 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. Claw 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 an increasing use in decorative applications.
Cap Bolts　

• Hex socket head cap screw Kishiwada stainless steel coarse pitch
• Nominal diameter (d) M10
• Length under head (ℓ) 50.0
• Pitch (P) 1.5
• Thread section (b) Reference 32
• Head diameter (dk) Max (Nominal) (1) 16 Max (2) 16.27 Min 15.73
• Head height (k) Max (Nominal) 10 Min 9.64
• Hex socket width across flats (s) Nominal 8 Max 8.175 Min 8.025
• Hex socket depth (t) Min 5
• ℓ dimension full thread range 40
• (1)Max diameter without knurling
• (2)Max diameter with knurling