Hexagon Socket Head Cap Screw

A round head with a deep hex socket, tightened with a hex key; it sits in a counterbore and fits where a spanner cannot reach. The deep socket lets the key seat fully, so the screw can be tightened firmly without the tool slipping or rounding the socket. Keep the socket free of swarf before tightening. Typical uses: machines, tooling, jigs and moulds.

In stockShips within 3 working daysMade to orderShips within 15 working days

M3 × 0.5168 variantsb18k3s2.5
Lengthmm	Material	Grade	Finish		Stock	MOQpcs	≈ kg/ 1,000 pcs	Quantitypcs
6	Stainless Steel	A2-70	Passivated		Made to order	2,000	0.74
	6	Stainless Steel	A2-70	Plain		Made to order	2,000	0.74
	6	Stainless Steel	A4-80	Passivated		Made to order	2,000	0.74
	6	Stainless Steel	A4-80	Plain		Made to order	2,000	0.74
	6	Carbon Steel	Class 8.8	Plain		Made to order	2,000	0.73
	6	Carbon Steel	Class 8.8	Zinc Plated		Made to order	2,000	0.74
	6	Carbon Steel	Class 8.8	Blackened		Made to order	2,000	0.73
	6	Carbon Steel	Class 8.8	Phosphate		Made to order	2,000	0.73
	6	Alloy Steel	Class 10.9	Plain		Made to order	2,000	0.73
	6	Alloy Steel	Class 10.9	Zinc Plated		Made to order	2,000	0.74
	6	Alloy Steel	Class 10.9	Blackened		Made to order	2,000	0.73
	6	Alloy Steel	Class 10.9	Phosphate		Made to order	2,000	0.73
	6	Alloy Steel	Class 12.9	Plain		Made to order	2,000	0.73
	6	Alloy Steel	Class 12.9	Blackened		Made to order	2,000	0.73
	6	Alloy Steel	Class 12.9	Phosphate		Made to order	2,000	0.73
8	Stainless Steel	A2-70	Passivated		Made to order	2,000	0.83
	8	Stainless Steel	A2-70	Plain		Made to order	2,000	0.83
	8	Stainless Steel	A4-80	Passivated		Made to order	2,000	0.83
	8	Stainless Steel	A4-80	Plain		Made to order	2,000	0.83
	8	Carbon Steel	Class 8.8	Plain		Made to order	2,000	0.82
	8	Carbon Steel	Class 8.8	Zinc Plated		Made to order	2,000	0.83
	8	Carbon Steel	Class 8.8	Blackened		Made to order	2,000	0.82
	8	Carbon Steel	Class 8.8	Phosphate		Made to order	2,000	0.82
	8	Alloy Steel	Class 10.9	Plain		Made to order	2,000	0.82
	8	Alloy Steel	Class 10.9	Zinc Plated		Made to order	2,000	0.83
	8	Alloy Steel	Class 10.9	Blackened		Made to order	2,000	0.82
	8	Alloy Steel	Class 10.9	Phosphate		Made to order	2,000	0.82
	8	Alloy Steel	Class 12.9	Plain		Made to order	2,000	0.82
	8	Alloy Steel	Class 12.9	Blackened		Made to order	2,000	0.82
	8	Alloy Steel	Class 12.9	Phosphate		Made to order	2,000	0.82
10	Stainless Steel	A2-70	Passivated		Made to order	2,000	0.92
	10	Stainless Steel	A2-70	Plain		Made to order	2,000	0.92
	10	Stainless Steel	A4-80	Passivated		Made to order	2,000	0.92
	10	Stainless Steel	A4-80	Plain		Made to order	2,000	0.92
	10	Carbon Steel	Class 8.8	Plain		Made to order	2,000	0.91
	10	Carbon Steel	Class 8.8	Zinc Plated		Made to order	2,000	0.92
	10	Carbon Steel	Class 8.8	Blackened		Made to order	2,000	0.91
	10	Carbon Steel	Class 8.8	Phosphate		Made to order	2,000	0.91
	10	Alloy Steel	Class 10.9	Plain		Made to order	2,000	0.91
	10	Alloy Steel	Class 10.9	Zinc Plated		Made to order	2,000	0.92
	10	Alloy Steel	Class 10.9	Blackened		Made to order	2,000	0.91
	10	Alloy Steel	Class 10.9	Phosphate		Made to order	2,000	0.91
	10	Alloy Steel	Class 12.9	Plain		Made to order	2,000	0.91
	10	Alloy Steel	Class 12.9	Blackened		Made to order	2,000	0.91
	10	Alloy Steel	Class 12.9	Phosphate		Made to order	2,000	0.91
12	Stainless Steel	A2-70	Passivated		Made to order	2,000	1.01
	12	Stainless Steel	A2-70	Plain		Made to order	2,000	1.01
	12	Stainless Steel	A4-80	Passivated		Made to order	2,000	1.01
	12	Stainless Steel	A4-80	Plain		Made to order	2,000	1.01
	12	Carbon Steel	Class 8.8	Plain		Made to order	2,000	1.00
	12	Carbon Steel	Class 8.8	Zinc Plated		Made to order	2,000	1.01
	12	Carbon Steel	Class 8.8	Blackened		Made to order	2,000	1.00
	12	Carbon Steel	Class 8.8	Phosphate		Made to order	2,000	1.00
	12	Alloy Steel	Class 10.9	Plain		Made to order	2,000	1.00
	12	Alloy Steel	Class 10.9	Zinc Plated		Made to order	2,000	1.01
	12	Alloy Steel	Class 10.9	Blackened		Made to order	2,000	1.00
	12	Alloy Steel	Class 10.9	Phosphate		Made to order	2,000	1.00
	12	Alloy Steel	Class 12.9	Plain		Made to order	2,000	1.00
	12	Alloy Steel	Class 12.9	Blackened		Made to order	2,000	1.00
	12	Alloy Steel	Class 12.9	Phosphate		Made to order	2,000	1.00
16	Stainless Steel	A2-70	Passivated		Made to order	2,000	1.19
	16	Stainless Steel	A2-70	Plain		Made to order	2,000	1.19
	16	Stainless Steel	A4-80	Passivated		Made to order	2,000	1.19
	16	Stainless Steel	A4-80	Plain		Made to order	2,000	1.19
	16	Carbon Steel	Class 8.8	Plain		Made to order	2,000	1.18
	16	Carbon Steel	Class 8.8	Zinc Plated		Made to order	2,000	1.19
	16	Carbon Steel	Class 8.8	Blackened		Made to order	2,000	1.18
	16	Carbon Steel	Class 8.8	Phosphate		Made to order	2,000	1.18
	16	Alloy Steel	Class 10.9	Plain		Made to order	2,000	1.18
	16	Alloy Steel	Class 10.9	Zinc Plated		Made to order	2,000	1.19
	16	Alloy Steel	Class 10.9	Blackened		Made to order	2,000	1.18
	16	Alloy Steel	Class 10.9	Phosphate		Made to order	2,000	1.18
	16	Alloy Steel	Class 12.9	Plain		Made to order	2,000	1.18
	16	Alloy Steel	Class 12.9	Blackened		Made to order	2,000	1.18
	16	Alloy Steel	Class 12.9	Phosphate		Made to order	2,000	1.18
20	Stainless Steel	A2-70	Passivated		Made to order	2,000	1.37
	20	Stainless Steel	A2-70	Plain		Made to order	2,000	1.37
	20	Stainless Steel	A4-80	Passivated		Made to order	2,000	1.37
	20	Stainless Steel	A4-80	Plain		Made to order	2,000	1.37
	20	Carbon Steel	Class 8.8	Plain		Made to order	2,000	1.35
	20	Carbon Steel	Class 8.8	Zinc Plated		Made to order	2,000	1.37
	20	Carbon Steel	Class 8.8	Blackened		Made to order	2,000	1.35
	20	Carbon Steel	Class 8.8	Phosphate		Made to order	2,000	1.35
	20	Alloy Steel	Class 10.9	Plain		Made to order	2,000	1.35
	20	Alloy Steel	Class 10.9	Zinc Plated		Made to order	2,000	1.37
	20	Alloy Steel	Class 10.9	Blackened		Made to order	2,000	1.35
	20	Alloy Steel	Class 10.9	Phosphate		Made to order	2,000	1.35
	20	Alloy Steel	Class 12.9	Plain		Made to order	2,000	1.35
	20	Alloy Steel	Class 12.9	Blackened		Made to order	2,000	1.35
	20	Alloy Steel	Class 12.9	Phosphate		Made to order	2,000	1.35
25	Stainless Steel	A2-70	Passivated		Made to order	2,000	1.59
	25	Stainless Steel	A2-70	Plain		Made to order	2,000	1.59
	25	Stainless Steel	A4-80	Passivated		Made to order	2,000	1.59
	25	Stainless Steel	A4-80	Plain		Made to order	2,000	1.59
	25	Carbon Steel	Class 8.8	Plain		Made to order	2,000	1.57
	25	Carbon Steel	Class 8.8	Zinc Plated		Made to order	2,000	1.59
	25	Carbon Steel	Class 8.8	Blackened		Made to order	2,000	1.57
	25	Carbon Steel	Class 8.8	Phosphate		Made to order	2,000	1.57
	25	Alloy Steel	Class 10.9	Plain		Made to order	2,000	1.57
	25	Alloy Steel	Class 10.9	Zinc Plated		Made to order	2,000	1.59
	25	Alloy Steel	Class 10.9	Blackened		Made to order	2,000	1.57
	25	Alloy Steel	Class 10.9	Phosphate		Made to order	2,000	1.57
	25	Alloy Steel	Class 12.9	Plain		Made to order	2,000	1.57
	25	Alloy Steel	Class 12.9	Blackened		Made to order	2,000	1.57
	25	Alloy Steel	Class 12.9	Phosphate		Made to order	2,000	1.57
30	Stainless Steel	A2-70	Passivated		Made to order	2,000	1.81
	30	Stainless Steel	A2-70	Plain		Made to order	2,000	1.81
	30	Stainless Steel	A4-80	Passivated		Made to order	2,000	1.81
	30	Stainless Steel	A4-80	Plain		Made to order	2,000	1.81
	30	Carbon Steel	Class 8.8	Plain		Made to order	2,000	1.79
	30	Carbon Steel	Class 8.8	Zinc Plated		Made to order	2,000	1.81
	30	Carbon Steel	Class 8.8	Blackened		Made to order	2,000	1.79
	30	Carbon Steel	Class 8.8	Phosphate		Made to order	2,000	1.79
	30	Alloy Steel	Class 10.9	Plain		Made to order	2,000	1.79
	30	Alloy Steel	Class 10.9	Zinc Plated		Made to order	2,000	1.81
	30	Alloy Steel	Class 10.9	Blackened		Made to order	2,000	1.79
	30	Alloy Steel	Class 10.9	Phosphate		Made to order	2,000	1.79
	30	Alloy Steel	Class 12.9	Plain		Made to order	2,000	1.79
	30	Alloy Steel	Class 12.9	Blackened		Made to order	2,000	1.79
	30	Alloy Steel	Class 12.9	Phosphate		Made to order	2,000	1.79
35	Stainless Steel	A2-70	Passivated		Made to order	2,000	2.03
	35	Stainless Steel	A2-70	Plain		Made to order	2,000	2.03
	35	Stainless Steel	A4-80	Passivated		Made to order	2,000	2.03
	35	Stainless Steel	A4-80	Plain		Made to order	2,000	2.03
	35	Carbon Steel	Class 8.8	Plain		Made to order	2,000	2.01
	35	Carbon Steel	Class 8.8	Zinc Plated		Made to order	2,000	2.04
	35	Carbon Steel	Class 8.8	Blackened		Made to order	2,000	2.01
	35	Alloy Steel	Class 10.9	Plain		Made to order	2,000	2.01
	35	Alloy Steel	Class 10.9	Zinc Plated		Made to order	2,000	2.04
	35	Alloy Steel	Class 10.9	Blackened		Made to order	2,000	2.01
	35	Alloy Steel	Class 12.9	Plain		Made to order	2,000	2.01
	35	Alloy Steel	Class 12.9	Blackened		Made to order	2,000	2.01
40	Stainless Steel	A2-70	Passivated		Made to order	2,000	2.26
	40	Stainless Steel	A2-70	Plain		Made to order	2,000	2.26
	40	Stainless Steel	A4-80	Passivated		Made to order	2,000	2.26
	40	Stainless Steel	A4-80	Plain		Made to order	2,000	2.26
	40	Carbon Steel	Class 8.8	Plain		Made to order	2,000	2.23
	40	Carbon Steel	Class 8.8	Zinc Plated		Made to order	2,000	2.26
	40	Carbon Steel	Class 8.8	Blackened		Made to order	2,000	2.23
	40	Alloy Steel	Class 10.9	Plain		Made to order	2,000	2.23
	40	Alloy Steel	Class 10.9	Zinc Plated		Made to order	2,000	2.26
	40	Alloy Steel	Class 10.9	Blackened		Made to order	2,000	2.23
	40	Alloy Steel	Class 12.9	Plain		Made to order	2,000	2.23
	40	Alloy Steel	Class 12.9	Blackened		Made to order	2,000	2.23
45	Stainless Steel	A2-70	Passivated		Made to order	2,000	2.48
	45	Stainless Steel	A2-70	Plain		Made to order	2,000	2.48
	45	Stainless Steel	A4-80	Passivated		Made to order	2,000	2.48
	45	Stainless Steel	A4-80	Plain		Made to order	2,000	2.48
	45	Carbon Steel	Class 8.8	Plain		Made to order	2,000	2.46
	45	Carbon Steel	Class 8.8	Zinc Plated		Made to order	2,000	2.48
	45	Carbon Steel	Class 8.8	Blackened		Made to order	2,000	2.46
	45	Alloy Steel	Class 10.9	Plain		Made to order	2,000	2.46
	45	Alloy Steel	Class 10.9	Zinc Plated		Made to order	2,000	2.48
	45	Alloy Steel	Class 10.9	Blackened		Made to order	2,000	2.46
	45	Alloy Steel	Class 12.9	Plain		Made to order	2,000	2.46
	45	Alloy Steel	Class 12.9	Blackened		Made to order	2,000	2.46
50	Stainless Steel	A2-70	Passivated		Made to order	2,000	2.70
	50	Stainless Steel	A2-70	Plain		Made to order	2,000	2.70
	50	Stainless Steel	A4-80	Passivated		Made to order	2,000	2.70
	50	Stainless Steel	A4-80	Plain		Made to order	2,000	2.70

3330 combinations shown

Matching components

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Nylon Insert Lock NutDIN 985 · M4–M36

Serrated Hex Flange NutDIN 6923 · M5–M16

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Heavy Flat Washer for Spring Pin Bolts DIN 7349

Heavy Duty Flat WasherDIN 7349 · M3–M24

Split Spring WasherDIN 127 · M3–M36

Questions

Why is 12.9 not offered zinc plated?

Electroplating traps hydrogen in hardened 12.9 steel, and the screw can crack after tightening. 12.9 is supplied Dacromet, phosphated, blackened and plain instead.