GOST 15522-70 Hexagon Lock Nuts with Reduced Width Across Flats, Product Grade B. Construction and Dimensions

GOST 15522-70 applies to hexagon lock nuts with reduced width across flats, product grade B, with thread diameters from 8 to 48 mm.

HEXAGON LOCK-NUTS WITH REDUCED WIDTH ACROSS FLATS, PRODUCT GRADE B Construction and dimensions Hexagon lock-nuts with reduced width across flats, product grade B. Construction and dimensions	GOST 15522-70

Effective date 01.01.72

1. The standard applies to hexagon lock nuts with reduced width across flats, product grade B, with thread diameters from 8 to 48 mm.

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

3. Thread — per GOST 24705.

3a. Dimensional tolerances, form and position deviations not specified in this standard, and inspection methods — per GOST 1759.1.

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

5. Technical requirements — per GOST 1759.0.

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

mm

Nominal thread diameter d		8	10	12	(14)	16	(18)	20	(22)	24	(27)	30	36	42	48
Thread pitch	coarse	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		12	14	17	19	22	24	27	30	32	36	41	50	60	70
Circumscribed circle diameter e, min		13.1	15.3	18.7	20.9	23.9	26.2	29.6	33.0	35.0	39.6	45.2	55.4	66.4	76.9
da	min	8	10	12	14	16	18	20	22	24	27	30	36	42	48
	max	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		10.6	12.5	15.5	17.2	20.1	22.0	24.8	27.7	29.5	33.2	38.0	46.6	55.9	64.7
Height m		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

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

Example of a designation for a type 1 nut with thread diameter d = 12 mm, coarse pitch, tolerance class 6H, property class 04, plain:

Nut M12-6H.04 GOST 15522-70

Same, type 2, fine pitch, tolerance class 6H, property class 05, made of steel grade 40Kh, with coating 01, 6 μm thick:

Nut 2M12×1.25-6H.05.40Kh.016 GOST 15522-70

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 »
8	2.116	18	17.222	30	87.045
10	3.416	20	25.153	36	161.395
12	6.257	22	34.137	42	278.715
14	8.621	24	39.868	48	448.428
16	13.414	27	56.850

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

INFORMATIONAL DATA

1. Developed and submitted by the Ministry of Ferrous Metallurgy of the USSR.

Developers: I. N. Nedoviziy, Candidate of Technical Sciences; B. M. Rigmant; V. I. Mokrinskiy, Candidate of Technical Sciences.

2. Approved and put into effect by Resolution No. 178 of the Committee for Standards, Measures and Measuring Instruments under the Council of Ministers of the USSR dated 18.02.70.

3. Introduced for the first time.

4. Referenced 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

5. The validity restriction was lifted by Protocol No. 5-94 of the Interstate Council for Standardization, Metrology and Certification (IUS 11-12-94).

6. Reissue (September 1998) incorporating Amendments No. 2, 3, 4, 5, 6, 7, approved in February 1974, March 1981, June 1983, May 1985, March 1989, July 1995 (IUS 3-74, 6-81, 11-83, 8-85, 6-89, 9-95).

Corresponds to DIN 431.