GOST 3033-79 Swing Bolts

Swing bolts with thread diameter from 5 to 36 mm. The standard does not apply to swing bolts used in machine tool fixtures.

Bolts are manufactured in the following types:

1 — bolts with round head;

2 — bolts with round head and a hole for a cotter pin;

3 — bolts with a fork.

Bolts can be manufactured in product grades B and C.

The design and dimensions of swing bolts of types 1 and 2 shall conform to those shown in the drawing and in Table 1, and of type 3 — in the drawing and in Table 2.

• Reference dimension

Table 1

Dimensions in mm

Nominal thread diameter d	L	l₀	D	d₁	d₂	b	l	R	Weight of 1000 pcs, kg ≈, type 1
5	25	16	10	4	1.6	6	2.5	4	5.000
	32								6.000
	36	20							7.000
	40	25							7.000
	45	30							8.000
	50								9.000
	55								9.500
	60								10.00
6	32	16	12	5		8		5	8.000
	36	20							9.000
	40	25							10.00
	45	30							11.00
	50								12.00
	55								13.00
	60	35							14.00
	65								15.00
	70								16.00
8	36	20	14	6	2	10	3.5		18.00
	40	25							19.00
	45	30							21.00
	50								22.00
	55	35							24.00
	60								26.00
	65								28.00
	70	40							29.00
	75	45							31.00
	80								33.00
10	40	25	18	8		12		6	32.00
	45	30							35.00
	50								37.00
	55	35							40.00
	60	40							43.00
	65								46.00
	70	45							49.00
	75								51.00
	80								54.00
	85								57.00
	90	55							60.00
	95								63.00
	100	65							66.00
12	45	30	20	10	2	14	3.5	8	47.00
	50	35							50.00
	55								54.00
	60	40							59.00
	65								63.00
	70	45							67.00
	75								71.00
	80	50							75.00
	85								80.00
	90	60							84.00
	95								88.00
	100	65							92.00
	110	75							101.00
	125								117.00
(14)	50	30	24	12	3	16	4.5	10	83.00
	60	40							93.00
	65	45							99.00
	70	50							104.00
	75								110.00
	80								116.00
	85	65							122.00
	90								127.00
	95								133.00
	100	75							138.00
	110								150.00
	125								167.00
	140	90							170.00
16	60	40	28	14		18			117.00
	70	50							131.00
	75								137.00
	80	55							145.00
	85								153.00
	90	65							160.00
	95								167.00
	100	75							175.00
	110								192.00
	120								206.00
	125								212.00
	140	90							235.00
	160	110							268.00
20	80	55	34	18	4	22	5.5	12	230.00
	90	65							250.00
	100	75							276.00
	110	80							300.00
	125	80							330.00
	140	95							370.00
	160	110							413.00
	180								460.00
	200								510.00
24	100	70	42	20		26		16	430.00
	110	80							459.00
	125								510.00
	140	95							565.00
	160	110							631.00
	180								687.00
	200								768.00
	220								840.00
	250	125							940.00
30	125	90	52	25	6	34		20	836.00
	140	95							926.00
	160	110							1026.00
	180								1140.00
	200								1250.00
	220								1365.00
	250	125							1530.0
	280								1690.0
36	140	95	64	30		40	7.0	22	1466.0
	160	100							1612.0
	180	125							1768.0
	200								1923.0
	220								2030.0
	250	140							2300.0
	280								2500.0
	320								2800.0

Table 2

Dimensions in mm

Nominal thread diameter d	L	l₀	l₁	l₂	d₁	d₂	B	b₁	b₂	b₃	Weight of 1000 pcs, kg ≈
10	60	35	16	10	8	12	16	16	8	3.8	48.0
	65	40									50.0
	70	45									53.0
12	65	35	18	12	10	15	20	20	10	4.8	80.0
	70	40									84.0
	75	50									88.0
	80	50									91.0
(14)	65	30	22	14	12	18	24	24	12	5.8	115.0
	70	35									119.0
	75	40									123.0
	80	45									127.0
	85	50									131.0
	90	55									135.0
	95	60									139.0
	100	70									143.0
16	80	40	26	16	14	20	28	28	14	6.8	202.0
	85	45									209.0
	90	50									216.0
	95	55									222.0
	100	60									229.0
	110	70									243.0
20	110	60	34	20	18	24	36	36	18	8.8	446.0
	125	70									477.0
	140	80									508.0
24	140	70	42	24	20	28	40	46	22	11.7	811.0
	160	80									873.0
	180										945.0
	200	90									1016.0
30	160	80	52	30	25	35	52	60	30	14.7	1581.0
	180	90									1685.0
	200	100									1792.0
36	180	90	60	36	30	42	64	68	34	16.7	2540.0
	200	100									2680.0

Appendix 1 to Tables 1 and 2

2. Weight is given for steel bolts. To determine the weight of bolts made of brass, the weight values given in Table 1 and Table 2 should be multiplied by a factor of 1.08; for bronze — by 0.97.

3. Bolts with thread d = 14 mm are not recommended for use.

Example of designation for a swing bolt of product grade B, type 1, thread diameter d = 6 mm, tolerance class 6g, length L = 32 mm, property class 3.6, made of killed steel, with a 6 μm zinc coating, chromated:

Bolt B.M6-6g 32.36.C.016 GOST 3033-79

The same, product grade C, type 2, thread diameter d = 10 mm, tolerance class 8g, length L = 60 mm, made of material group 32, without coating:

Bolt C2M10-8g 60.32. GOST 3033-79

4. Limit deviations of the hole diameter in the head d₁:

for bolts of product grade B — H12;

for bolts of product grade C — H14.

6. Limit deviations of head width b — d11.

7. Limit deviations of dimension l₂ — H14.

8. Limit deviations of slot width b₂ — H12.

9. Limit deviations of dimensions obtained by stamping — per class 2 of GOST 7505.

10. When the thread is produced by rolling, the shank diameter shall conform to GOST 19256.

11. For bolts of product grade C, the following are permitted:

surface roughness of the surfaces forming dimension b — Ra ≤ 100 μm, and of the hole surface with diameter d₁ — Ra ≤ 20 μm;

limit deviations of head width b — per class 2 of GOST 7505.

14. Thread — per GOST 24705.

15. Dimensions of thread runouts — per GOST 27148, chamfered end — per GOST 12414.

16. Other technical requirements — per GOST 1759.0.

16a. The tolerance for the intersection of the head axis and the axis of the hole in the head, and the perpendicularity tolerance of the axis of the hole in the head relative to the shank axis over a length equal to 0.5 b or 0.5b₁ — per GOST 24643, for bolts:

of product grade B — per accuracy grade 13;

of product grade C — per accuracy grade 14.

16b. Dimensional tolerances not specified by this standard, the coaxiality tolerance of the head and shank, and inspection methods — per GOST 1759.1.

16c. Permissible surface defects of bolts and inspection methods — per GOST 1759.2.

17. Methods of nut locking are given in Appendix 1. Examples of swing bolt applications are given in Appendix 2.

APPENDIX 1

Recommended

METHODS OF NUT LOCKING

1. The nut of a type 2 swing bolt is locked by installing a pin. The pin fitted into the bolt hole shall be riveted (peened) on both sides.

2. By agreement between the customer and the manufacturer, the nut may also be locked by center-punching (staking) the thread of the swing bolt, or by mechanically closing the last two thread turns at two opposite points on the sides, or by center-punching the end face, depending on the thread diameter.

3. Material for pins: steel wire grade 10 or 15 per GOST 17305, brass wire grade L63 per GOST 1066, or VT1-00 per technical specifications approved in the prescribed manner.

4. The dimensions of pins for locking the nut of a type 2 swing bolt shall conform to those shown in the drawing and in the table.

Dimensions in mm

Nominal thread diameter of the swing bolt d	Pin diameter d₂	Pin diameter L js 16	Weight of 1000 pins, kg
5	1.6	6	0.095
6		7	0.120
8	2.0	9.5	0.240
10		11.5	0.280
12		13.5	0.330
(14)	3.0	16	0.880
16		18	0.990
20	4.0	22	2.170
24		26	2.620
30	6.0	32	7.100
36		38	8.300

APPENDIX 2

Recommended

EXAMPLES OF SWING BOLT APPLICATIONS

INFORMATIONAL DATA

1. Supersedes GOST 3033-73.

2. Referenced normative-technical documents:

Designation of the referenced regulatory document	Clause/appendix number
GOST 1066-90	Appendix 1
GOST 1759.0-87	16
GOST 1759.1-82	16b
GOST 1759.2-82	16c
GOST 7505-89	10, 13
GOST 12414-94	15
GOST 17305-91	Appendix 1
GOST 19256-73	12
GOST 24643-81	16a
GOST 24705-2004	14
GOST 27148-86	15

Corresponds to GOST 14724-69, GOST 14725-69 and DIN 444.