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Tel +44 1452 424346
Fax +44 1452 309313

Unit 1 Shepherd Road
Gloucester
GL2 5EL

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Socket Head Countersunk Screws

We carry extensive stocks of high quality SOCKET HEAD COUNTERSUNK SCREWS in a range of sizes and materials, in Metric, British and American thread forms.

Metric DIN 7991

A Nominal Dia	Pitch	A	A1	B	C	D	E
M2	0.40	5.00	3.85	1.24	1.27	16	16
M2.5	0.45	4.00	4.82	1.55	1.50	17	17
M3	0.50	6.72	5.82	1.86	2.00	18	25
M3.5	0.70	7.00	6.80	2.17	2.00	19	19
M4	0.70	8.96	7.80	2.48	2.50	20	25
M5	0.80	11.20	9.78	3.10	3.00	22	30
M6	1.00	13.44	11.73	3.72	4.00	24	35
M8	1.25	17.92	15.73	4.96	5.00	28	45
M10	1.50	22.40	19.67	6.20	6.00	32	50
M12	1.75	26.88	23.67	7.44	8.00	36	60
M14	2.00	30.24	26.67	8.12	10.00	40	60
M16	2.00	33.60	29.67	8.80	10.00	44	70
M18	2.50	36.96	32.61	9.48	12.00	48	60
M20	2.50	40.32	35.61	10.16	12.00	52	90
M22	2.50	37.38	35.61	13.31	14.00	56	56
M24	3.00	40.42	38.61	14.22	14.00	60	90
M27	3.00	46.00	45.30	17.95	17.00	66	66
M30	3.50	53.00	52.00	21.65	17.00	72	72

Head Angle - Up to and including M20=90°/92°. Over M20=60°/62°
D - Minimum/full thread = 2 x Nominal Diameter + 12mm
E - Screws with length equal to or shorter than this are threaded
to head.
Guide only - dimensions may vary dependant on manufacturer.

Thread Forms
Metric, Metricfine, UNF, UNC, BSW,
BSF, BA

Materials
Grade 8.8, Grade 10.9, Grade 12.9
A2/304 Stainless Steel
A4/316 Stainless Steel
Aluminium
Titanium
Nylon

Finishes
Bright zinc plated
Zinc and yellow
Black zinc
Nickel