GOST 5927-70 Hexagon Nuts, Product Grade A

GOST 5927-70. Hexagon nuts, product grade A

HEXAGON NUTS, PRODUCT GRADE A. Construction and dimensions Hexagon nuts, product grade A. Construction and dimensions	GOST 5927-70 (ST SEV 3680-82)

Effective date 01.01.72

With respect to the width across flats S=13 mm — effective 01.01.73.

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

This standard fully complies with ST SEV 3680-82.

(Amended, Amendment No. 4).

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

(Amended edition, Amendments No. 3, 4, 6, 7).

3. Thread — per GOST 24705.

(Amended edition, Amendments No. 2, 4, 5).

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.

3a, 3b. (Added, Amendment No. 5).

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.

(Amended edition, Amendment No. 2, 5).

5. Technical requirements — per GOST 1759.0.

6. (Deleted, Amendment No. 2).

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

8. (Deleted, Amendment No. 4).

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	0.30	0.35	0.40	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		3.4			4.3	5.5	6	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	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	45.40	51.80
dw, min		2.90			3.60	4.50	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		1.0		1.3	1.6	2.0	2.4	2.8	3.2	4.7	5.2	6.8	8.4	10.8	12.8	14.8	16.4	18.0	19.8	21.5	23.6	25.6		31.0	34.0	38.0

Notes:

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

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

3. Nuts may be manufactured with nominal height m of not less than 0.8d and tolerances per GOST 1759.1, provided the requirements of GOST 1759.5 are met.

Example of designation for a nut with thread diameter d = 12 mm, width across flats S = 18 mm, coarse thread pitch with tolerance class 6H, property class 5, uncoated:

Nut M12-6H.5 (S18) GOST 5927-70

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 5927-70

Same, with width across flats S = 19 mm, fine thread pitch, tolerance class 6H, property class 12, made of steel grade 40Kh, with coating 01, thickness 6 µm:

Nut M12×1.25-6H.12.40Kh.016 GOST 5927-70

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	0.062	5	1.440	20	71.44
1.4	0.057	6	2.573	22	103.15
1.6	0.074	8	5.548	24	122.87
2	0.141	10	10.220	27	175.28
2.5	0.272	12	15.670	30	242.54
3	0.377	14	25.33	36	416.78
3.6	0.497	16	37.61	42	623.88
4	0.800	18	53.27	48	956.20

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 1. (Amended edition, Amendments No. 3, 6).

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	18.9	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 ≈	12.06	18.40	28.91	85.67

APPENDIX 2. (Added, Amendment No. 6; amended edition, Amendment No. 7).

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 12.08.70.

3. This standard fully complies with ST SEV 3680-82.

4. Supersedes GOST 5927-62.

5. 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 1759.5-87	2
GOST 1759.1-82	2.3a	GOST 24705-81	3
GOST 1759.3-83	3b

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

7. Reissue (September 1998) with 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 555, DIN 934, ISO 4032, ISO 8673.