GOST 15524-70 Hexagon Thick Nuts, Product Grade A

Hexagon thick nuts, product grade A. Construction and dimensions. Hexagon thick nuts product grade A. Construction and dimensions	GOST 15524-70 (ST SEV 5636-86)

Effective date 01.01.72; for the width across flats S=13 mm size — 01.01.73.

1. This standard applies to hexagon thick nuts, product grade A, with thread diameter from 3 to 48 mm.

This standard fully complies with ST SEV 5636-86.

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

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		6	7.7	8.8	11.1	14.4	17.8	20.0	23.9	26.8	30.1	33.5	37.7	40.0	45.6	51.3	61.3	72.6	83.9
da	min	3	4	5	6	8	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
dw, min		5.00	6.30	7.20	9.00	11.7	14.6	16.6	19.6	22.5	25.3	28.2	31.7	33.6	38.4	43.1	51.5	61.0	70.5
hw	max	0.4		0.5		0.6				0.8
	min	0.15								0.20								0.25
Height m		3.6	4.8	6.0	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 15524-70

Same, with coarse thread pitch, tolerance class 6H, property class 6, made from steel grade A12, plain (no coating):

Nut M12-6H.6.A (S18) GOST 15524-70

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 15524-70

3. Thread — per GOST 24705.

3a. Tolerances for dimensions, form and position deviations of surfaces, and inspection methods not established by this standard — per GOST 1759.1.

3b. Permissible surface defects of nuts and inspection methods — per GOST 1759.3.

4. By agreement between the manufacturer and the customer, nuts with nominal thread diameter from 36 to 48 mm may be manufactured with a thread pitch of 2 mm.

5. Technical requirements — per GOST 1759.0.

6. The mass of nuts is given in Appendix 1.

APPENDIX 1

For reference

Weight of steel nuts (type 1) with coarse thread pitch

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	170.00
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

For reference

Dimensions in mm

Nominal thread diameter d	10	12	14	22
Width across flats S	17	19	22	32
Circumscribed circle diameter e, min	18.9	21.1	24.5	35.7
dw, min	15.6	17.4	20.6	30.0
Theoretical weight of 1000 nuts (design 1) with coarse thread pitch, kg ≈	16.92	22.51	37.56	109.90

INFORMATIONAL DATA

This standard was developed and submitted by the Ministry of Ferrous Metallurgy of the USSR. Approved and put into effect by Decree No. 178 of the Committee for Standards, Measures and Measuring Instruments under the Council of Ministers of the USSR dated 12.08.70. Fully complies with ST SEV 5636-86. Introduced for the first time.

Referenced normative-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