ISOscrewsSocket head (cylindrical)

ISO 4762 Hexagon Socket Head Cap Screw

The ISO version of the metric socket head cap screw. Dimensionally very close to DIN 912, with small differences in nominal head height across some sizes.

ISO 4762 M8 × 50 — Socket head (cylindrical)Nominal dimensions in mm · Not to scale

Dimensions15 sizes · millimetres

Thread d	Pitch P (mm)	Head diameter dk (mm)	Head height k (mm)	Socket size s (mm)	Thread length b (min) (mm)
M2	0.4	3.8	2	1.5	16
M2.5	0.45	4.5	2.5	2	17
M3	0.5	5.5	3	2.5	18
M4	0.7	7	4	3	20
M5	0.8	8.5	5	4	22
M6	1	10	6	5	24
M8	1.25	13	8	6	28
M10	1.5	16	10	8	32
M12	1.75	18	12	10	36
M14	2	21	14	12	40
M16	2	24	16	14	44
M18	2.5	27	18	14	48
M20	2.5	30	20	17	52
M22	2.5	33	22	17	56
M24	3	36	24	19	60

Nominal dimensions in millimetres as published in ISO 4762. Tolerances, material requirements and marking are defined separately by the issuing body.

Available sizeslinked to individual specification pages

M2 × 4 M2 × 5 M2 × 6 M2 × 8 M2 × 10 M2 × 12 M2 × 16 M2 × 20

M2.50.45 mm pitch

M2.5 × 4 M2.5 × 5 M2.5 × 6 M2.5 × 8 M2.5 × 10 M2.5 × 12 M2.5 × 16 M2.5 × 20 M2.5 × 25

M3 × 5 M3 × 6 M3 × 8 M3 × 10 M3 × 12 M3 × 16 M3 × 20 M3 × 25 M3 × 30

M4 × 6 M4 × 8 M4 × 10 M4 × 12 M4 × 16 M4 × 20 M4 × 25 M4 × 30 M4 × 40

M5 × 8 M5 × 10 M5 × 12 M5 × 16 M5 × 20 M5 × 25 M5 × 30 M5 × 40 M5 × 50

M6

M6 × 10 M6 × 12 M6 × 16 M6 × 20 M6 × 25 M6 × 30 M6 × 35 M6 × 40 M6 × 50 M6 × 60

M81.25 mm pitch

M8 × 12 M8 × 16 M8 × 20 M8 × 25 M8 × 30 M8 × 35 M8 × 40 M8 × 50 M8 × 60 M8 × 80

M101.5 mm pitch

M10 × 16 M10 × 20 M10 × 25 M10 × 30 M10 × 35 M10 × 40 M10 × 50 M10 × 60 M10 × 80 M10 × 100

M121.75 mm pitch

M12 × 20 M12 × 25 M12 × 30 M12 × 35 M12 × 40 M12 × 50 M12 × 60 M12 × 80 M12 × 100

M14

M14 × 25 M14 × 30 M14 × 35 M14 × 40 M14 × 50 M14 × 60 M14 × 80 M14 × 100

M16

M16 × 25 M16 × 30 M16 × 35 M16 × 40 M16 × 50 M16 × 60 M16 × 80 M16 × 100

M182.5 mm pitch

M18 × 30 M18 × 35 M18 × 40 M18 × 50 M18 × 60 M18 × 80 M18 × 100

M202.5 mm pitch

M20 × 30 M20 × 35 M20 × 40 M20 × 50 M20 × 60 M20 × 80 M20 × 100

M222.5 mm pitch

M22 × 40 M22 × 50 M22 × 60 M22 × 80 M22 × 100

M24

M24 × 40 M24 × 50 M24 × 60 M24 × 80 M24 × 100

Thread referencesused by the sizes above

M2 × 0.4 M2.5 × 0.45 M3 × 0.5 M4 × 0.7 M5 × 0.8 M8 × 1.25 M10 × 1.5 M12 × 1.75 M18 × 2.5 M20 × 2.5 M22 × 2.5