GOST 5929-70 Hexagon Lock Nuts, Product Grade A

GOST 5929-70 applies to hexagon lock nuts, product grade A, with thread diameter from 1 to 48 mm. The standard fully corresponds to ST SEV 3681-82.

Hexagon lock nuts, product grade A. Construction and dimensions Hexagon lock-nuts, product grade A. Construction and dimensions	GOST 5929-70 (ST SEV 3681-82)

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.

Dimensional tolerances, form and position deviations not specified in this standard, and inspection methods — per GOST 1759.1. Permissible surface defects of nuts and inspection methods — per GOST 1759.3.

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

Technical requirements — per GOST 1759.0.

The mass of nuts is given in Appendix 1.

mm

Nominal thread diameter d		(1)	(1.4)	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
Thread pitch	coarse	0.25	0.3	0.35	0.4	0.45	0.5	0.6	0.7	0.8	1	1.25	1.5	1.75	2		2.5			3		3.5	4	4.5	5
	fine	-							0.5		0.75	1	1.25		1.5					2			3
Width across flats S		3.2			4	5	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		3.4			4.3	5.5	6.0	6.6	7.7	8.8	11.1	14.4	17.8	20.0	23.4	26.8	30.1	33.5	37.7	40.0	45.6	51.3	61.3	72.6	83.9
da	min	1.0	1.4	1.6	2.0	2.5	3.0	3.5	4.0	5.0	6.0	8.0	10	12	14	16	18	20	22	24	27	30	36	42	48
	max	1.15	1.61	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		2.90			3.60	4.5	5.00	5.40	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
Height m		0.8	1.0		1.2	1.6	1.8	2.0	2.2	2.7	3.2	4.0	5.0	6.0	7.0	8.0	9.0	10	11	12	13.5	15	18	21	24

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 designation for a nut with thread diameter d = 12 mm, width across flats S = 18 mm, coarse thread pitch, tolerance field 6H, property class 04, plain:

Nut M12-6H.04 (S18) GOST 5929-70

Same, with coarse thread pitch, tolerance field 6H, property class 04, made of steel grade A12, plain:

Nut M12-6H.04.A (S18) GOST 5929-70

Same, with width across flats S = 19 mm, fine thread pitch, tolerance field 6H, property class 06, made of steel grade 40Kh, with coating 01, thickness 6 µm:

Nut M12×1.25-6H.06.40Kh.016 GOST 5929-70

Appendix 1 (informative). Mass of steel nuts 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 ≈
1	0.049	5	0.720	20	37.24
1.4	0.044	6	1.420	22	54.02
1.6	0.043	8	2.942	24	64.40
2	0.083	10	5.456	27	94.62
2.5	0.188	12	7.826	30	134.75
3	0.238	14	12.60	36	229.90
3.5	0.312	16	18.76	42	379.38
4	0.456	18	29.84	48	583.66

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, 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 mass of 1000 nuts with coarse thread pitch, kg ≈	6.542	9.290	14.59	44.44

Informational data

The standard was developed by the Ministry of Ferrous Metallurgy of the USSR. Approved and put into effect by Resolution No. 178 of the Committee for Standards, Weights and Measuring Instruments under the Council of Ministers of the USSR dated 12.08.70. Fully corresponds to ST SEV 3681-82. Supersedes GOST 2569-62.

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

The validity period restriction was lifted under Protocol No. 5-94 of the Interstate Council for Standardization, Metrology and Certification.