GOST 1481-84 Hex Head Set Screws with Cylindrical Point, Product Grades A and B. Design and Dimensions

State Standard of the Union of Soviet Socialist Republics

HEX HEAD SET SCREWS WITH CYLINDRICAL POINT, PRODUCT GRADES A AND B	GOST 1481-84 (ST SEV 4207-83)
Design and dimensions
Hexagon-head dog-point set screws. Product grades A and B. Construction and dimensions

Effective date 01.01.86

Non-compliance with the standard is punishable by law

This standard applies to set screws with nominal thread diameter from 6 to 36 mm.

The construction and dimensions of the screws shall conform to those shown in the drawing and table.

D=(0.90÷0.95)S

mm

Nominal thread diameter d		6	8	10	12	16	20	24	30	36
Width across flats S		8	10	12	14	17	22	30	36	46
Head height k		5	6	7	9	11	14	17	21	25
Screw length l	12		-	-	-	-	-	-	-	-
	14			-	-	-	-	-	-	-
	16				-	-	-	-	-	-
	18				-	-	-	-	-	-
	20					-	-	-	-	-
	25						-	-	-	-
	30						-	-	-	-
	35							-	-	-
	40	-						-	-	-
	45	-	-						-	-
	50	-	-			Standard			-	-
	55	-	-	-		lengths			-	-
	60	-	-	-						-
	65	-	-	-	-			-	-	-
	70	-	-	-	-					-
	75	-	-	-	-			-	-	-
	80	-	-	-	-
	90	-	-	-	-	-
	100	-	-	-	-	-
	120	-	-	-	-	-	-
	140	-	-	-	-	-	-	-
	160	-	-	-	-	-	-	-
	180	-	-	-	-	-	-	-	-
	200	-	-	-	-	-	-	-	-

Example of designation for a grade B screw with thread diameter d=10 mm, tolerance class 6g, length l=25 mm, property class 14H, without coating:

Screw B.M10-6g×25.14H GOST 1481-84

Same, product grade A, property class 45H, made of steel 40Kh with chemical oxide coating, oil-impregnated:

Screw A.M10-6g×25.45H.40Kh.05 GOST 1481-84

Same, made of brass LS 59-1, without coating:

Screw A.M10-6g×25.32 GOST 1481-84

Thread — per GOST 24705-81, coarse pitch. Thread runout — normal, per GOST 10549-80.

Radius under head — per GOST 24670-81.

Screw point — cylindrical per GOST 12414-66.

Tolerances and methods for inspecting dimensions, form and location deviations of surfaces — per GOST 1759.1-82.

Surface defects and inspection methods — per GOST 1759.2-82.

Mechanical properties and test methods for screws: made of carbon and alloy steel — per GOST 25556-82; made of corrosion-resistant, heat-resistant, heat-treatable steel and non-ferrous alloys — per GOST 1759-70.

Screws are manufactured with the following coatings: chromated zinc, chromated cadmium, nickel, oxide impregnated with oil, phosphate impregnated with oil, or without coating.

Other technical requirements — per GOST 1759-70.

The theoretical mass of screws is given in the reference appendix.

Appendix

For reference

Theoretical mass of 1000 pcs. of steel screws, kg

Screw length l, mm	Nominal thread diameter d, mm
	6	8	10	12	16	20	24	30	36
12	3.97	-	-	-	-	-	-	-	-
14	4.33	8.09	-	-	-	-	-	-	-
16	4.70	8.71	14.63	-	-	-	-	-	-
18	5.21	9.51	15.31	-	-	-	-	-	-
20	5.40	9.98	16.76	25.15	-	-	-	-	-
25	6.31	11.58	18.84	28.86	52.35	-	-	-	-
30	7.21	13.25	21.36	32.48	58.87	-	-	-	-
35	8.47	14.82	23.87	36.09	65.43	117.01	-	-	-
40	-	16.42	26.39	39.79	72.17	126.52	-	-	-
45	-	-	28.90	43.42	78.79	137.87	232.13	-	-
50	-	-	31.42	47.02	85.49	148.29	247.13	-	-
55	-	-	-	50.72	92.16	158.70	262.11	-	-
60	-	-	-	54.34	98.78	169.15	277.10	456.97	-
65	-	-	-	-	105.52	179.57	-	-	-
70	-	-	-	-	112.15	189.98	307.0	504.37	-
75	-	-	-	-	118.78	200.39	-	-	-
80	-	-	-	-	125.51	210.84	337.06	551.77	889.38
9 Q	-	-	-	-	-	231.61	367.04	599.17	958.16
100	-	-	-	-	-	252.47	397.02	646.57	1026.95
120	-	-	-	-	-	-	456.97	741.36	1164.52
140	-	-	-	-	-	-	-	836.16	1302.10
160	-	-	-	-	-	-	-	930.96	1439.67
180	-	-	-	-	-	-	-	-	1577.25
200	-	-	-	-	-	-	-	-	1714.82

Note. To determine the mass of screws made of other materials, the mass values given in the table must be multiplied by the factor:

0.356 — for aluminium alloy;

0.97 — for bronze;

1.08 — for brass.

Equivalent to DIN 561.