GOST 5933-73 Hexagon Slotted and Castle Low Nuts, Product Grade A. Design and Dimensions

GOST 5933-73 covers hexagon slotted and castle low nuts of product grade A with thread diameter from 6 to 48 mm.

The standard fully complies with ST SEV 2663-89.

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

Table 1

mm

HEXAGON SLOTTED AND CASTLE LOW NUTS, PRODUCT GRADE A	GOST 5933-73
Design and dimensions
Hexagon thin slotted and castle nuts, accuracy class A. Construction and dimensions

Nominal thread diameter d		6	8	10	12	(14)	16	(18)	20	(22)	24	(27)	30	(33)	36	(39)	42	48
Thread pitch	coarse	1.0	1.25	1.5	1.75	2.0	2.0	2.5	2.5	2.5	3.0	3.0	3.5	3.5	4.0	4.0	4.5	5.0
	fine	-	1.0	1.25	1.25	1.5	1.5	1.5	1.5	1.5	2.0	2.0	2.0	2.0	3.0	3.0	3.0	3.0
Width across flats S		10	13	16	18	21	24	27	30	34	36	41	46	50	55	60	65	75
Height h		6	7	8	10	11	12	13	13	15	15	17	18	20	20	22	23	25
Distance from the bearing surface to the bottom of the slot f and of the castle m		3.5	4.0	5.0	6.0	7.0	7.0	8.0	8.0	9.0	9.0	11	11	13	13	13	14	16
dw, min		9.0	11.7	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	60.6	69.4
Circumscribed circle diameter e, min		11.1	14.4	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	72.6	83.9
Chamfer diameter da	min	6	8	10	12	14	16	18	20	22	24	27	30	33	36	39	42	48
	max	6.75	8.75	10.8	13.0	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
Crown diameter D		-	-	-	16	19	22	25	28	32	34	38	42	46	50	55	58	65
Number of slots		6															8
Slot width n		2.0	2.5	2.8	3.5		4.5			5.5			7.0				9.0
Cotter pin size (recommended) per GOST 397	Type 1	1.6×16	2×20	2.5×25	3.2×32		4×36	4×40		5×45		5×50	6.3×63		6.3×71		8×80	8×90
	Type 2	-	-	-	3.2×25		4×32	4×36		5×40		5×45	6.3×50		6.3×63		8×71	8×80

Notes:

1. Dimensions in parentheses are not recommended for use.

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

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

Example of designation for a design 1 nut, thread diameter d = 12 mm, coarse thread, tolerance class 6H, property class 04, uncoated:

Nut M12 - 6H.04 GOST 5933-73

Same, design 2, fine thread pitch, tolerance class 6H, with coating 01, thickness 9 µm:

Nut 2M12×1.25 - 6H.04.019 GOST 5933-73

Thread — per GOST 24705.

A chamfer on the slot or crown side is permitted.

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

Technical requirements — per GOST 1759.0.

Theoretical mass of nuts is given in Annex 1.

Appendix 1. Weight of steel nuts with coarse thread

Table 2

Nominal thread diameter d, mm	Theoretical mass of 1000 nuts, kg
	Type 1	Type 2
6	2.473	-
8	4.789	-
10	9.055	-
12	13.129	11.096
14	20.186	16.940
16	26.078	22.490
18	37.303	32.850
20	46.315	40.960
22	66.578	59.630
24	76.349	67.810
27	116.110	103.260
30	152.560	132.570
33	200.715	175.525
36	248.870	218.480
39	313.540	271.320
42	378.210	324.160
48	570.480	486.140

Appendix 2

Table 3

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	35.8
d w, min	15.6	17.4	20.6	30.0

Information data

The standard fully complies with ST SEV 2663-89.

The standard complies with international standards ISO 4032-79, ISO 4035-79 in terms of width across flats dimensions.

Supersedes GOST 5933-62.

Referenced normative documents

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

Corresponds to DIN 979, ISO 7038.