GOST 5935-73 Hexagon Slotted Thin Nuts with Reduced Width Across Flats, Product Grade A. Design and Dimensions

INTERSTATE STANDARD

HEXAGON SLOTTED THIN NUTS WITH REDUCED WIDTH ACROSS FLATS, PRODUCT GRADE A	GOST 5935-73
Design and dimensions
Hexagon thin slotted nuts with reduced width across flats, accuracy class A. Construction and dimensions

Effective date 01.01.74

This standard applies to hexagon slotted thin nuts with reduced width across flats, product grade A, with thread diameters from 8 to 48 mm.

(Revised edition, Amendment No. 2).

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

Dimensions, mm

Nominal thread diameter d		8	10	12	(14)	16	(18)	20	(22)	24	(27)	30	(33)	36	(39)	42	48
Thread pitch	coarse	1.25	1.5	1.75	2	2	2.5	2.5	2.5	3	3	3.5	3.5	4	4	4.5	5
	fine	1	1.25	1.25	1.5	1.5	1.5	1.5	1.5	2	2	2	2	3	3	3	3
Width across flats S		12	14	16	18	21	24	27	30	34	36	41	46	50	55	60	70
Height h		7	8	10	11	12	13		15		17	18	20	20	22	23	25
Circumscribed circle diameter e, min		13.3	15.5	17.8	20.0	23.4	26.8	30.1	33.5	37.7	40.0	45.6	51.3	55.8	61.3	67.0	78.3
dw, min		10.6	12.6	14.6	16.6	19.6	22.5	25.3	27.7	31.7	33.2	38.3	42.7	46.6	51.1	55.9	65.8
Number of slots		6														8
Slot width n		2.5	2.8	3.5		4.5			5.5			7				9
Distance from bearing surface to base of slot m (tolerance per h14)		4	5	6	7		8		9		11		13			14	16
Chamfer diameter da	min	8	10	12	14	16	18	20	22	24	27	30	33	36	39	42	48
	max	8.75	10.8	13	15.1	17.3	19.4	21.6	23.8	25.9	29.2	32.4	35.6	38.9	42.2	45.4	51.8
Cotter pin size (recommended) per GOST 397		2×20	2.5×25	3.2×25		4×32	4×36		5×40		5×45	6.3×50	6.3×56	6.3×63	6.3×71	8×71	8×80

Notes:

1. Dimensions in parentheses are not recommended for use.

2. For products designed before 01.01.91, nuts with dimensions specified in Annex 2 may be used.

Example designation for a nut with thread diameter d = 12 mm, coarse thread pitch, tolerance class 6H, property class 04, without coating:

Nut M12 - 6H.04 GOST 5935-73

Same, with fine thread pitch, tolerance class 6H, with coating 01, thickness 9 µm:

Nut M12×1.25 - 6H.04.019 GOST 5935-73

(Amended edition, Amendments No. 1, 2, 3, 4).

2. Thread — per GOST 24705.

(Amended edition, Amendment No. 3).

3. A chamfer on the slot side is permitted.

3a. The shape of the slot bottom may be flat, rounded, or chamfered.

(Added, Amendment No. 2).

4. Technical requirements — per GOST 1759.0. Nut property class 04.

(Amended, Amendment No. 4).

5. Theoretical mass of nuts is given in Annex 1.

APPENDIX 1

For reference

Mass of steel nuts with coarse thread pitch

Nominal thread diameter d, mm	Theoretical mass of 1000 pcs of nuts, kg ≈
8	3.768
10	5.659
12	9.052
14	12.257
16	18.289
18	25.371
20	32.790
22	45.907
24	74.467
27	75.490
30	105.090
33	144.170
36	183.250
39	238.190
42	293.130
48	459.92

To determine the mass of nuts made of other materials, the mass values given in the table should be multiplied by the following factors:

0.356 - for aluminium alloy;

1.080 - for brass.

ANNEX 1. (Amended edition, Amendments No. 2, 4).

APPENDIX 2

For reference

mm

Nominal thread diameter d	12	14	16	24
Width across flats S	17	19	22	32
Circumscribed circle diameter e, min	18.9	21.1	24.5	35.8
dw, min	15.6	17.4	20.6	30.0

ANNEX 2. (Introduced additionally, Amendment No. 4).

INFORMATIONAL DATA

1. DEVELOPED AND SUBMITTED BY the USSR State Committee for Standards

2. APPROVED AND PUT INTO EFFECT by Decree of the USSR State Committee for Standards of the Council of Ministers dated 23.01.73 No. 141

3. The standard conforms to international standards ISO 4032-79, ISO 4035-79 with respect to width across flats dimensions.

4. SUPERSEDES GOST 5935-62

5. REFERENCE REGULATORY AND TECHNICAL DOCUMENTS

Designation of the referenced regulatory document	Clause number
GOST 397-79	1
GOST 1759.0-87	4
GOST 24705-2004	2

6. The validity restriction was lifted by Protocol No. 4-93 of the Interstate Council for Standardization, Metrology and Certification (IUS 4-94)

7. EDITION 2006 with Amendments No. 1, 2, 3, 4, approved in September 1979, December 1981, October 1984, March 1989 (IUS 10-79, 2-82, 1-85, 6-89).