ButtonHex socket head cap screw(Coarse Titanium Unplated 6 X 12(P=1.0 Pitch 1.0

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JIS B 1174
A hex socket button bolt characterized by its rounded head shape.
Also known as a button cap screw.
Compared to a hex socket head cap screw of the same size, the hex socket is smaller.
There are two types of button cap screws: the "3S Standard," an industry association standard (union standard) that was established earlier, and the "JIS Standard," which was subsequently established in accordance with ISO. The two types differ in head dimensions.
3S Standard (Manufacturers: Tokokisha Kinzoku SS, Gosho SS, Chubu Raiji, Kyokuto SS)
JIS Standard (Manufacturers: Nissan Neji, Ansco, Alps Seiko)

Button CAP Standard Comparison
Thread Pitch List

• Nominal diameter (d): M6
• Length under head (L): 12.0
• Coarse pitch: 1.0
• Head diameter (dk): Max 10.50, Min 10.07
• Head height (k): Max 3.3, Min 3.0
• Hex socket width across flats (s): Nominal 4, Max 4.095, Min 4.020
• Hex socket depth (t): Min 2.08
• Note: JIS standard