GOST 1146-80 Raised Countersunk Head Wood Screws

Raised Countersunk Head Wood Screws

CONSTRUCTION AND DIMENSIONS

GOST 1146-80

(ST SEV 2328-80)

State Standard of the Union of Soviet Socialist Republics

Countersunk head wood screws. Construction and dimensions. Raised countersunk head wood screws. Construction and dimensions	GOST 1146-80 (ST SEV 2328-80)

Effective date 1982-01-01

1. This standard applies to countersunk head wood screws with shank diameter from 1.6 to 10 mm.

The standard fully complies with ST SEV 2328-80. The requirements of the standard are mandatory.

2. The construction and dimensions of the screws shall conform to those shown in the drawing and in Tables 1 and 2.

*Dimensions for reference.

Table 1

mm

Thread diameter d (tolerance h₁₄)		1.6	2	2.5	3	3.5	4	5	6	8	10
Minor thread diameter d₂, max		1.1	1.4	1.7	2.1	2.4	2.8	3.5	4.2	5.6	7.0
Thread pitch P (tolerance ± 0.2P)		0.8	1	1.25	1.25	1.5	1.75	2	2.5	3.5	4.5
Head diameter D		3.0	3.8	4.7	5.6	6.5	7.4	9.2	11.0	14.5	18.0
Head height without sphere K, max		0.96	1.2	1.5	1.65	1.93	2.2	2.5	3	4	5
Sphere height f≈		0.4	0.5	0.6	0.75	0.9	1	1.25	1.5	2	2.5
Sphere radius R₁≈		3.4	4.2	5.4	6.0	6.8	8	9.4	12	15	19
Cross recess number		-	0	1		2			3		4
Cross recess diameter m, max		-	2.3	3.0	3.3	4.4	4.8	5.4	7.3	8.7	11.2
Cross recess depth h, max		-	1.5	1.7	2.0	2.2	2.5	3.1	3.5	5.0	6.1
Depth of gauge engagement in the cross recess.	max	-	1.6	1.9	2.2	2.5	2.8	3.4	4.0	5.5	6.8
	min	-	1.3	1.6	1.9	2.0	2.3	2.9	3.5	5.0	6.3

Table 2

mm

Screw length l	Screw diameter d
	1.6	2	2.5	3	3.5	4	5	6	8	10
7				-	-	-	-	-	-	-
10						-	-	-	-	-
13								-	-	-
16	-							-	-	-
(18)	-	-	Standard lengths						-	-
20	-	-							-	-
(22)	-	-							-	-
25	-	-							-	-
30	-	-	-						-	-
35	-	-	-	-					-	-
40	-	-	-	-					-	-
45	-	-	-	-	-				-	-
50	-	-	-	-	-					-
60	-	-	-	-	-					-
70	-	-	-	-	-	-				-
80	-	-	-	-	-	-	-
90	-	-	-	-	-	-	-
100	-	-	-	-	-	-	-

Note. Screw lengths given in parentheses are not recommended for use.

Example of a designation for a type 1 screw, diameter d=3 mm, length l=20 mm, made of low-carbon steel, plain (uncoated):

Wood screw 1 - 3×20 GOST 1146-80

Same, with a 6 µm zinc coating applied by cathodic reduction, chromated:

Wood screw 1 - 3×20.016 GOST 1146-80

Same, type 2, made of corrosion-resistant steel, plain (uncoated):

Wood screw 2 - 3×20.2 GOST 1146-80

3. Slot recesses — per GOST 24669, cross recesses — per GOST 10753.

3a. The diameter of the plain shank section d₁ shall be not less than the diameter for thread rolling, or shall not exceed the nominal value of the screw’s major thread diameter.

4. Technical requirements — per GOST 1147.

5. The theoretical mass of the screws is given in Appendix 1.

6. Where interchangeability is required for use in products designed before 1 January 1980, screws may be manufactured, by agreement with the customer, with tolerances per Appendix 2.

APPENDIX 1

For reference

Mass of Steel Wood Screws

Wood screw length l, mm	Theoretical mass of 1000 pcs. steel wood screws, kg at nominal thread diameter d, mm
	1.6	2	2.5	3	3.5	4	5	6	8	10
7	0.10	0.16	0.24	-	-	-	-	-	-	-
10	0.14	0.21	0.33	0.48	0.67	-	-	-	-	-
13	0.17	0.27	0.42	0.61	0.85	1.10	1.72	-	-	-
16	-	0.33	0.51	0.74	1.02	1.33	2.09	-	-	-
18	-	-	0.57	0.83	1.14	1.49	2.33	3.35	-	-
20	-	-	0.63	0.92	1.26	1.64	2.57	3.69	-	-
22	-	-	0.69	1.01	1.38	1.80	2.81	4.04	-	-
25	-	-	0.78	1.14	1.55	2.03	3.18	4.56	-	-
30	-	-	-	1.36	1.85	2.41	3.78	5.42	-	-
35	-	-	-	-	2.14	2.80	4.39	6.29	-	-
40	-	-	-	-	2.44	3.18	4.99	7.16	-	-
45	-	-	-	-	- ,	3.57	5.60	8.02	-	-
50	-	-	-	-	-	3.95	6.20	8.89	15.83	-
60	-	-	-	-	-	4.72	7.41	10.62	18.88	-
70	-	-	-	-	-	-	8.62	12.35	21.93	-
80	-	-	-	-	-	-	-	14.08	24.98	39.04
90	-	-	-	-	-	-	-	15.81	28.04	43.79
100	-	-	-	-	-	-	-	17.54	31.09	48.53

Note. To determine the mass of brass screws, multiply the masses given in the table by a factor of 1.08.

APPENDIX 2

For reference

TOLERANCES FOR HALF-ROUND HEAD WOOD SCREWS UNDER THE ESDP SEV AND OST SYSTEM

Tolerance zones
per ESDP SEV	per OST system
h14	B₇
js17	CM₁₀

INFORMATIONAL DATA

1. DEVELOPED AND SUBMITTED BY the Ministry of Ferrous Metallurgy of the USSR

DEVELOPERS: V. G. Vilde, R. V. Zhirova, T. M. Khlopunova, T. E. Yurchenko

2. APPROVED AND PUT INTO EFFECT by Decree of the USSR State Committee for Standards dated 30.06.80 No. 3274

3. The standard fully complies with ST SEV 2328-80

4. SUPERSEDES GOST 1146-70

5. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS.

Designation of the referenced regulatory document	Clause number
GOST 1147-80	4
GOST 10753-86	3
GOST 24669-81	3

6. Reviewed in 1990. By Gosstandart Decree No. 406 dated 29.03.91, the validity period restriction was lifted

7. REISSUE (October 1997) with Amendments No. 1, 2, approved in December 1981 and March 1991 (IUS 3-82, 6-91)

Corresponds to DIN 95, DIN 7983.