Hexagon Socket Head Cap Screws

Shape and dimensions of hex socket head cap screws

＊1 Shall be applied to non-shaded nominal diameters between thick stepwise lines.
＊2 Shall be applied to unknurled head
＊3 Shall be applied to knurled head
＊4 emin= 1.14 smin
＊5 See JIS B 1016 for gauge inspection of hex socket dimensions s and e.

＊ Range of nominal length generally distributed is between thick stepwise lines. Shaded nominal length shall be full thread, and length of imperfect thread under head shall be 3P or less.
Non-shaded values show ℓg and ℓs values based on the next formula: ℓg max = ℓnom - b, ℓs min = ℓg max - 5P

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