GOST 15523-70 Hexagon Thick Nuts, Product Grade B. Construction and Dimensions

GOST 15523-70 applies to hexagon thick nuts of product grade B with thread diameter from 3 to 48 mm.

This standard fully complies with ST SEV 5636-86.

HEXAGON THICK NUTS, PRODUCT GRADE B Construction and dimensions Hexagon thick nuts product grade B. Construction and dimensions	GOST 15523-70 (ST SEV 5636-86)

Effective date 01.01.72; for the width across flats S = 13 mm, effective date 01.01.73.

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

Thread — per GOST 24705.

Tolerances on dimensions, form and position deviations, and inspection methods not established by this standard — per GOST 1759.1.

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

Technical requirements — per GOST 1759.0.

The mass of nuts is given in Appendix 1.

Table 1

mm

Nominal thread diameter d		3	4	5	6	8	10	12	(14)	16	(18)	20	(22)	24	(27)	30	36	42	48
Thread pitch	coarse	0.5	0.7	0.8	1	1.25	1.5	1.75	2		2.5			3		3.5	4,	4.5	5
	fine	-				1	1.25		1.5					2			3
Width across flats S		5.5	7	8	10	13	16	18	21	24	27	30	34	36	41	46	55	65	75
Circumscribed circle diameter e, min		5.9	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	3.0	4.0	5.0	6.0	8.0	10	12	14	16	18	20	22	24	27	30	36	42	48
	max	3.45	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
d w, min		5.0	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
h w	max	0.4		0.5		0.6				0.8
	min	0.15								0.20								0.25
Height m		3.6	4.8	6	7.2	9.6	12	14	17	19	22	24	26	29	32	36	43	50	58

Notes:

1. Nut dimensions shown in brackets are not recommended for use.
2. Nuts may be manufactured with the dimensions specified in Appendix 2.

Example of a designation for a type 1 nut with thread diameter d = 12 mm, width across flats S = 18 mm, coarse thread pitch, tolerance class 6H, property class 5, plain (no coating):

Nut M12-6H.5 (S18) GOST 15523-70

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 15523-70

APPENDIX 1 (informative). Mass of steel nuts (type 1) with coarse pitch thread

Nominal thread diameter d, mm	Theoretical mass of 1000 pcs of nuts, kg »	Nominal thread diameter d, mm	Theoretical mass of 1000 pcs of nuts, kg »	Nominal thread diameter d, mm	Theoretical mass of 1000 pcs of nuts, kg »
3	0.562	12	19.030	24	170.90
4	1.183	14	32.650	27	232.70
5	1.798	16	47.170	30	334.70
6	3.188	18	69.81	36	574.70
8	8.285	20	93.15	42	930.60
10	14.260	22	132.90	48	1451.00

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

APPENDIX 2 (informative). Dimensions in mm

Nominal thread diameter d	10	12	14	22
Width across flats S	17	19	22	32
Circumscribed circle diameter e, min	18.7	20.9	23.9	35.0
d w, min	15.5	17.2	20.1	29.5
Theoretical mass of 1000 nuts (design 1) with coarse thread pitch, kg »	16.92	22.51	37.56	109.90

5. REFERENCE REGULATORY AND TECHNICAL DOCUMENTS

Designation of the referenced regulatory document	Clause number	Designation of the referenced regulatory document	Clause number
GOST 1759.0-87	5	GOST 1759.3-83	3b
GOST 1759.1-82	3a	GOST 24705-81	3

Corresponds to DIN 6330.