GOST 5919-73 Low Slotted and Castellated Hexagon Nuts, Product Grade B. Design and Dimensions

GOST 5919-73 applies to low slotted and castellated hexagon nuts of product grade B with thread diameter from 6 to 48 mm.

The standard fully complies with ST SEV 2663-89.

LOW SLOTTED AND CASTELLATED HEXAGON NUTS, PRODUCT GRADE B	GOST 5919-73
Design and dimensions
Hexagon thin slotted and castle nuts, accuracy class B. Construction and dimensions

Effective date 01.01.74.

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

Table 1

mm

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 crown m		3.5	4.0	5.0	6.0	7.0	7.0	8.0	8.0	9	9	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	59.9	69.4
Circumscribed circle diameter e, min		10.9	14.2	17.6	19.9	22.8	26.2	29.6	33.0	37.3	39.6	45.2	50.9	55.4	60.8	66.5	71.3	82.6
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. For products designed before 01.01.91, nuts with dimensions specified in Annex 2 may be used.

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

Nut M12 - 6H.04 GOST 5919-73

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

Nut 2M12×1.25 - 6H.04.019 GOST 5919-73

2. Thread — per GOST 24705.

3. A chamfer on the slot or crown side is permitted.

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

4. Technical requirements — per GOST 1759.0.

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

APPENDIX 1

For reference

Mass of steel nuts with coarse thread pitch

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

For reference

Table 3

mm

Nominal thread diameter d	10	12	14	22
Width across flats S	17	19	22	32
Circumscribed circle diameter e, min	18.7	20.9	23.9	35.0
dw, min	15.5	17.2	20.1	29.5

INFORMATIONAL DATA

1. The standard was developed and submitted by the USSR State Committee for Standards.

2. Approved and put into effect by Resolution No. 141 of the State Committee for Standards of the Council of Ministers of the USSR dated 23.01.73.

3. The standard fully complies with ST SEV 2663-89.

4. Supersedes GOST 5919-62.

5. Referenced normative-technical documents:

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

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

7. Edition of 2006 with Amendments No. 1, 2, 3, 4, 5 approved in September 1979, December 1981, October 1984, March 1989, March 1990 (IUS 10-79, 2-82, 1-85, 6-89, 7-90).

Complies with DIN 937, EN ISO 7038.