GOST 1479-93 Cup-Point Straight Slotted Set Screws, Product Grades A and B. Specifications

This interstate standard establishes technical requirements for cup-point straight slotted set screws of product grades A and B, with nominal thread diameter d from 1.6 to 12 mm.

The requirements of this standard are mandatory. Additional requirements meeting the needs of the national economy are shown in italics.

Foreword

1. DEVELOPED by Gosstandart of Russia

SUBMITTED by the Technical Secretariat of the Interstate Council for Standardization, Metrology and Certification

2. ADOPTED by the Interstate Council for Standardization, Metrology and Certification on October 21, 1993

The following voted in favor of adoption:

Name of state	Name of national standardization body
Republic of Belarus Kyrgyz Republic Republic of Moldova Russian Federation Republic of Tajikistan Turkmenistan Ukraine	Belstandart Kyrgyzstandart Moldovastandart Gosstandart of Russia Tajikstandart Turkmenglavgosinspektsiya Gosstandart of Ukraine

3. By Decree No. 160 of the Committee of the Russian Federation for Standardization, Metrology and Certification dated June 2, 1994, interstate standard GOST 1479-93 was put into effect as a state standard of the Russian Federation on January 1, 1995.

4. SUPERSEDES GOST 1479-84

5. REISSUE

INTERSTATE STANDARD
SET SCREWS WITH CUP POINT AND STRAIGHT SLOT, PRODUCT GRADES A AND B Specifications Cup-point straight slotted set screws. Product grades A and B. Specifications	GOST 1479-93 (ISO 7436-83)

Effective date 1995-01-01

1. Dimensions

1.1. Screw dimensions shall conform to those shown in the figure and Table 1.

1. The 120° angle is mandatory for short screws, the length of which is given above the dashed stepped line in Table 1.

2. The 45° angle applies only to the part of the end below the minor diameter of the thread.

Table 1

In millimetres

Nominal thread diameter d					1.6	2	2.5	3	(3.5) D	4	5	6	8	10	12
Thread pitch P					0.35	0.4	0.45	0.5	0.6	0.7	0.8	1	1.25	1.5	1.75
df					Internal thread diameter
dz			min.		0.55	0.75	0.95	1.15	1.45	1.75	2.25	2.75	4.7	5.7	7.7
			max.		0.8	1	1.2	1.4	1.7	2	2.5	3	5	6	8
n			nom.		0.25	0.25	0.4	0.4	0.5	0.6	0.8	1	1.2	1.6	2
			min.		0.31	0.31	0.46	0.46	0.56	0.66	0.86	1.06	1.26	1.66	2.06
			max.		0.45	0.45	0.6	0.6	0.7	0.8	1	1.2	1.51	1.91	2.31
t			min.		0.56	0.64	0.72	0.8	0.96	1.12	1.28	1.6	2	2.4	2.8
			max.		0.74	0.84	0.95	1.05	1.21	1.42	1.63	2	2.5	3	3.6
l1)	Product grade
	A		B
nom- min.	min.	max.	min.	max.
3	1.8	2.2	1.5	2.5
2.5	2.3	2.7	2	3
3	2.8	3.2	2.5	3.5
4	3.7	4.3	3.4	4.6
5	4.7	5.3	4.4	5.6
6	5.7	6.3	5.4	6.6
8	7.7	8.3	7.3	8.7				Standard lengths
10	9.7	10.3	9.3	10.7
12	11.6	12.4	11.1	12.9
(14)	13.6	14.4	13.1	14.9
16	15.6	16.4	15.1	16.9
(18)	17.6	13.4	17.1	18.9
20	19.6	20.4	18.9	21.0
(22)	21.6	22.4	20.9	23.0
25	24.6	25.4	23.9	26.0
(28)	27.6	28.4	26.9	29.0
30	29.6	30.4	28.9	31.0
35	34.5	35.5	33.7	36.2
40	39.5	40.5	38.7	41.2
45	44.5	45.5	43.7	46.2
50	49.5	50.5	48.7	51.2
555	54.4	55.6	53.5	56.5
60	59.4	60.6	58.5	61.5
1) Dimensions in parentheses are not recommended for use.

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

2. Technical requirements

Screws shall be manufactured in accordance with the requirements given in Table 2.

Table 2

Material		Steel	Corrosion-resistant steel	Non-ferrous alloys
Thread	Tolerance class	6 g
	Standards	GOST 16093, GOST 24705
Mechanical properties	Property class or material group	14H, 22H 33H, 45H	27-26	31-35
	Standards	GOST 25556	GOST 1759.0
Tolerances	Product grade	A, B
	Standards	GOST 1759.1
Product surface		Plain. Requirements for electroplated coatings per GOST 9.301, GOST 9.303. Screws shall be manufactured with coatings: zinc, chromated, nickel, oxide oil-impregnated, phosphate oil-impregnated, or without coating. Other types of coatings may be used by agreement between the manufacturer and the customer.
Acceptance		Acceptance rules - GOST 17769
Test methods		Dimensions, form and position tolerances of surfaces - GOST 1759.1
		Surface defects - GOST 1759.2
		Mechanical properties
		GOST 25556	GOST 1759.0	GOST 1759.0
Marking and packaging		GOST 1759.0, GOST 18160

3. Designation

Designation examples

A cup-point straight slotted set screw of product grade B, thread diameter d = 10 mm, tolerance field 6g, length l = 25 mm, property class 14H, without coating:

Screw M10-6g×25.14H GOST 1479-93

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

Screw A.M10-6g×25.45H.40×05 GOST 1479-93

Same, made of brass LS59-1, without coating:

Screw A.M10-6g×25.32.LS59-1 GOST 1479-93

APPENDIX (informative)

Table 3 — Mass of screws

Screw length l, mm	Theoretical mass of 1000 pcs of steel screws, kg ≈, at nominal thread diameter d, mm
	1.6	2	2.5	3	(3.5)	4	5	6	8	10	12
2	0.019
2.5	0.027	0.037
3	0.035	0.049	0.068	0.102
4	0.050	0.074	0.106	0.146	0.169	0.245
5	0.066	0.099	0.147	0.190	0.249	0.322	0.461
6	0.082	0.124	0.179	0.234	0.319	0.400	0.584	0.804
8	0.142	0.173	0.259	0.322	0.469	0.555	0.832	1.156	2.020
10		0.222	0.339	0.411	0.619	0, 710	1.079	1.509	2.657	3.997
12			0.409	0.499	0.779	0.865	1.326	1.862	3.293	5.001	7.232
(14)				0.587	0.929	1.019	1.573	2.215	3.930	6.005	8.687
16				0.675	1.079	1.174	1.1821	2.568	4.567	7.009	10.141
(18)					1.199	1.329	2.068	2.920	5.204	8.013	11.603
20					1.379	1.484	2.315	3.273	5.841	9.021	13.050
(22)							2.562	3.626	6.477	10.020	14.502
25							2.933	4.155	7.433	11.534	16.693
(28)								4.684	8.388	13.033	18.871
30								5.037	9.025	14.041	20.323
35									10.621	16.550	23.062
40									12.214	19.061	27.591
45										21.573	31.234
50										24.082	34.860
55											38.160
60											42.500
Note - To determine the mass of screws made of other materials, the values given in the table shall be multiplied by a factor of: 0.356 for aluminium alloy, 0.97 for bronze, 1.08 for brass.

INFORMATIONAL DATA

REFERENCE REGULATORY AND TECHNICAL DOCUMENTS

Designation of the referenced regulatory document	Section number	Designation of the referenced regulatory document	Section number
GOST 9.301-86	2	GOST 16093-2004	2
GOST 9.303-84	2	GOST 17769-83	2
GOST 1759.0-87	2	GOST 24669-81	2
GOST 1759.1-82	2	GOST 24705-2004	2
GOST 1759.2-82	2	GOST 25556-82	2