GOST 5915-70 Hexagon Nuts, Product Grade B, Made to Order

GOST 5915-70 applies to hexagon nuts, product grade B, with thread diameter from 1.6 to 48 mm. The standard fully corresponds to ST SEV 3683-82.

Hexagon Nuts, Product Grade B. Construction and Dimensions Hexagon nuts, product grade B. Construction and dimensions	GOST 5915-70* (ST SEV 3683-82) Supersedes GOST 5915-62

By Decree No. 178 of the USSR State Committee for Standards, Weights and Measuring Instruments under the Council of Ministers dated February 18, 1970, the effective date was set as 01.07.72, and for the width across flats S = 16, 18, 21, 34 mm — as 01.01.91.

The design and dimensions of the nuts shall comply with those shown in the drawing and table.

Nominal thread size d		1.6	2	2.5	3	(3.5)	4	5	6	8	10	12	(14)	16	(18)	20	(22)	24	(27)	30	36	42	48
Pitch	Coarse	0.35	0.40	0.45	0.50	0.60	0.70	0.80	1	1.25	1.5	1.75	2	2	2.5	2.5	2.5	3	3	3.5	4	4.5	5
thread	Fine	-	-	-	-	-	-	-	-	1	1.25	1.25	1.5	1.5	1.5	1.5	1.5	2	2	2	3	3	3
Width across flats S		3.2	4.0	5.0	5.5	6	7	8	10	13	16	18	21	24	27	30	34	36	41	46	55	65	75
Circumscribed circle diameter e, min		3.3	4.2	5.3	5.9	6.4	7.5	8.6	10.9	14.2	17.6	19.9	22.8	26.2	29.6	33.0	37.3	39.6	45.2	50­,9	60.8	71.3	82.6
da	min	1.6	2	2.5	3	3.5	4	5	6	8	10	12	14	15	18	20	22	24	27	30	36	42	48
	max	1.84	2.30	2.9	3.45	4.00	4.60	5.75	6.75	8.75	10.8	13.0	15.1	17.3	19.4	21.6	23.8	25.9	29.2	32.4	38.9	45.4	51.8
dw, min		2.9	3.6	4.5	5.0	5.4	6.3	7.2	9.0	11.7	14.5	16.5	19.2	22.0	24.8	27.7	31.4	33.2	38.0	42.7	51.1	59.9	69.4
hw	max	0.2	0.2	0.3	0.4	0.4	0.4	0.5	0.5	0.6	0.6	0.6	0.6	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8
	min	0.10	0.10	0.10	0.15	0.15	0.15	0.15	0.15	0.15	0.15	0.15	0.15	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.25	0.25
Height m		1.3	1.6	2.0	2.4	2.8	3.2	4.7	5.2	6.8	8.4	10.8	12.8	14.8	16.4	18	19.8	21.5	23.6	25.6	31	34	38

Notes.

1. Nut dimensions shown in parentheses are not recommended for use.

2. Nuts may be manufactured with the dimensions specified in Appendix 2.

3. Nuts may be manufactured with a nominal height m of not less than 0.8 and limit deviations per GOST 1759.1-82, provided the requirements of GOST 1759.5-87 are met.

Example of designation for a nut, version 1, thread diameter d = 12 mm, width across flats S = 18 mm, coarse thread pitch with tolerance class 6H, property class 5, plain (uncoated):

Nut M12-6H.5 (S18) GOST 5915-70

Same, type 2, with width across flats S = 19 mm, fine thread pitch, tolerance class 6H, property class 12, made from steel grade 40Kh, with coating 01, thickness 6 μm:

Nut 2M12 × 1.25-6H.12.40Kh.016 GOST 5915-70

Thread — per GOST 24705-81.

Dimensional tolerances, form and position deviations not specified in this standard, and inspection methods — per GOST 1759.1-82.

Permissible surface defects of nuts and inspection methods — per GOST 1759.3-83.

Technical requirements — per GOST 1759.0-87.

The mass of nuts is given in Appendix 1.

Appendix 1. Informative

Mass of steel nuts (version 1) with coarse thread pitch.

Nominal thread diameter d, mm	Theoretical mass of 1000 pcs of nuts, kg ≈
1.6	0.074
2	0.141
2.5	0.272
3	0.377
3.5	0.497
4	0.800
5	1.440
6	2.573
8	5.548
10	10.220
12	15.670
14	25.330
16	37.610
18	53.270
20	71.440
22	103.150
24	122.870
27	175.280
30	242.540
36	416.780
42	623.880
48	956.200

To determine the mass of nuts made of other materials, the mass values given in the table should be multiplied by the following factors: 0.356 for aluminium alloy, 1.080 for brass.

Appendix 2. Informative

mm

Nominal thread diameter d	10	12	14	22
Width across flats S	17	19	22	32
Diameter of circumscribed circle, not less than	18.7	20.9	23.9	35.0
dw, min	15.5	17.2	20.1	29.5
Theoretical weight of 1000 nuts (design 1) with coarse thread pitch, kg ≈	12.06	18.40	28.91	85.67

Corresponds to DIN 555, DIN 934, ISO 4032, ISO 4034.