ButtonHex socket head cap screw(Nissan Neji(JIS(Coarse Steel Unplated 6 X 35 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 (cooperative standard) that was established first, and the "JIS Standard," which was later established in accordance with ISO, and the two differ in head dimensions.
3S Standard (Manufacturers: Toкosha Kinzoku SS, Goshō SS, Chubu Raši, Kyokuto SS)
JIS Standard (Manufacturers: Nissan Neji, Ansco, Alps Seiko)
Button CAP Standard Comparison
Pitch Size List

• Button cap screw, Nissan Neji, Coarse pitch
• JIS B 1174
• Nominal diameter (d): M6
• Length under head (ℓ): 35.0
• 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