GOST 5916-70 Hexagon Lock-Nuts, Product Grade B

GOST 5916-70 applies to hexagon lock-nuts, product grade B, with thread diameters from 1 to 48 mm. The standard fully complies with ST SEV 3685-82.

Effective date — 01.01.72, and for the width across flats S = 13 mm — 01.01.73.

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

Hexagon lock-nuts, product grade B. Construction and dimensions	GOST 5916-70 (ST SEV 3685-82)

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 are per GOST 1759.3.

Technical requirements — per GOST 1759.0.

The mass of nuts is given in Appendix 1.

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	-										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		3.3			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	1.0	1.4	1.6	2	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		2.9			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
Height h (h14 for d ≤ 12; h15 for M12 < d ≤ M18; h16 for d > M18)		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	10.0	11.0	12.0	13.5	15.0	18.0	21.0	24.0

Notes:

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

2. The limit deviations of height for M1-M6 nuts manufactured by blanking are per the relevant material standards.

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

Example of designation for a nut, design 1, with thread diameter d = 12 mm, width across flats S = 18 mm, coarse thread pitch, tolerance class 6H, property class 04, plain (uncoated):

Nut M12-6H.04 (S18) GOST 5916-70

The same, design 2, with width across flats S = 19 mm, fine thread pitch, tolerance class 6H, property class 05, made of steel grade 40Kh, with coating 01, thickness 6 µm:

Nut 2M12 × 1.25-6H.05.40Kh.016 GOST 5916-70

Appendix 1 (informative). Weight of steel nuts (design 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 ≈
1	0.037	5	0.656	20	35.53
1.4	0.038	6	1.254	22	50.01
1.6	0.057	8	2.667	24	59.79
2	0.074	10	5.020	27	88.06
2.5	0.163	12	6.840	30	127.15
3	0.218	14	11.67	36	216.99
3.5	0.276	16	17.68	42	360.63
4	0.431	18	25.98	48	558.12

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
dw, min	15.5	17.2	20.1	29.5
Theoretical weight of 1000 nuts (design 1) with coarse thread pitch, kg ≈	6.110	8.304	13.66	40.43

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. Supersedes GOST 5916-62. The standard fully complies with ST SEV 3685-82.

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.

Reissue (September 1998) with Amendments No. 2, 3, 4, 5, 6, 7.

Corresponds to DIN 439, DIN 936, ISO 4035, ISO 4036, ISO 8675.