GOST 1485-84 Square-Head Cup-Point Set Screws, Product Grades A and B. Construction and Dimensions

INTERSTATE STANDARD
SQUARE-HEAD CUP-POINT SET SCREWS, PRODUCT GRADES A AND B. CONSTRUCTION AND DIMENSIONS Square-head cup-point set screws. Product grades A and B. Construction and dimensions	GOST 1485-85

Effective date 01.01.86

1. This standard applies to set screws with a nominal thread diameter from 6 to 20 mm.

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

mm

Nominal thread diameter d		6	8	10	12	16	20
Width across flats S		7	8	10	12	17	22
Head height k		6	7	8	10	14	18
Circumscribed circle diameter e		9	10	13	16	22	28
Screw length l	12		-	-	-	-	-
	14			-	-	-	-
	16				-	-	-
	20					-	-
	25						-
	30			Standard lengths			-
	35
	40	-
	45	-	-
	50	-	-
	55	-	-	-
	60	-	-	-
	65	-	-	-	-
	70	-	-	-	-
	75	-	-	-	-
	80	-	-	-	-
	90	-	-	-	-	-
	100	-	-	-	-	-

Example of designation for a product 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 1485-84

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 1485-84

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

Screw A.M10-6g×25.32 GOST 1485-84

3. Thread — per GOST 24705, thread pitch — coarse. Thread run-out — normal, per GOST 10549.

4. Radius under the head — per GOST 24670.

5. Screw end — cup point, per GOST 12414.

6. Tolerances and methods of inspection for dimensions, form and position deviations of surfaces — per GOST 1759.1.

7. Surface defects and inspection methods — per GOST 1759.2.

8. Mechanical properties and test methods for screws: made of carbon and alloy steel — per GOST 25556; made of corrosion-resistant, heat-resistant, heat-resisting steel and non-ferrous alloys — per GOST 1759.1, GOST 1759.2, GOST 1759.4.

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

10. Other technical requirements — per GOST 1759.0.

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

Appendix (informative). Theoretical mass of 1000 pcs. of steel screws, kg

Screw length l, mm	Nominal thread diameter d, mm
	6	8	10	12	16	20
12	4.396	-	-	-	-	-
14	4.749	7.850	-	-	-	-
16	5.102	8.485	14.08	-	-	-
20	5.809	10.540	16.10	25.31	-	-
25	6.696	11.350	18.60	28.94	63.46	-
30	7.575	13.040	21.11	31.57	70.68	-
35	8.454	14.540	23.62	36.21	77.36	137.2
40	-	16.140	26.12	39.84	83.48	147.6
45	-	-	28.63	43.48	90.70	157.8
50	-	-	31.15	47.11	97.37	168.5
55	-	-	-	50.73	104.00	177.9
60	-	-	-	54.39	110.70	189.4
65	-	-	-	-	117.40	199.8
70	-	-	-	-	124.10	209.3
75	-	-	-	-	130.70	220.6
80	-	-	-	-	137.10	231.1
90	_		-	-	-	251.9
100	-	-	-	-	-	272.8

Note. To determine the mass of screws made of other materials, the mass values given in the table must be multiplied by a factor of: 0.356 for aluminium alloy, 1.97 for bronze, 1.08 for brass.

Referenced normative documents

Designation of the referenced regulatory document	Clause number
GOST 1759.0-87	10
GOST 1759.1-82	6, 8
GOST 1759.2-82	7, 8
GOST 1759.4-87	8
GOST 10549-80	3
GOST 12414-94	5
GOST 24670-81	4
GOST 24705-2004	3
GOST 25556-82	8

The standard is in effect with Amendment No. 1 (1987).

Corresponds to DIN 479.