GOST 10337-80 Captive Cylinder Head Screws with Spherical End

GOST 10337-80 applies to captive cylinder head screws with spherical end, product grade B, with nominal thread diameter from 2.5 to 12 mm.

Screw dimensions shall conform to those shown in the drawing and in Tables 1 and 2.

Reference dimension.

Table 1

mm

Nominal thread diameter d		2.5	3	4	5	6	8	10	12
Shank diameter d₁ (tolerance h13)		1.6	2.0	2.8	3.5	4.0	5.5	7.0	9.0
Thread length b		3	4	5	6	8	10	12	16
Head diameter D		4.5	5.5	7.0	8.5	10.0	13.0	16.0	18.0
Head height k		1.6	2.0	2.6	3.3	3.9	5.0	6.0	7.0
Spherical radius R₁		3.9	4.3	5.6	7.1	9.4	11.0	13.0	16.0
Radius under head R, not more than		0.2			0.4		0.5		0.6
Cross recess number		1		2		3		4
Cross recess diameter m		2.5	2.8	4.3	4.6	6.3	7.5	9.7	10.7
Cross recess depth h, max		1.2	1.5	2.0	2.3	2.5	3.7	4.6	5.6
Gauge penetration depth into cross recess	max	1.4	1.7	2.3	2.6	3.1	4.3	5.4	6.4
	min	1.1	1.4	1.8	2.1	2.6	3.8	4.9	5.9

Table 2

Note. Screw lengths shown in brackets are not recommended for use.

Example of designation for a design 1 screw with thread diameter d=8 mm, tolerance class 6g, length l=25 mm, property class 5.8, plain (no coating):

Screw M8-6g×25.58 GOST 10337-80.

Same, design 2, property class 8.8, made of steel grade 35Kh, with zinc coating 9 μm thick, chromated:

Screw 2M8-6g×25.88.35Kh.019 GOST 10337-80.

Thread — per GOST 24705-2004, thread pitch — coarse. Thread runout — per GOST 10549-80.

Tolerances and methods for inspecting dimensions and deviations of form and location of surfaces — per GOST 1759.1-82.

Surface defects and inspection methods — per GOST 1759.2-82.

Slot recesses — per GOST 24669-81, cross recesses — per GOST 10753-86.

Technical requirements — per GOST 1759.0-87.

Theoretical mass of screws is given in Appendix 1.

Appendix 1. Informative

Screw length l, mm	Theoretical mass of 1000 steel screws, kg, at nominal thread diameter d, mm
	2.5	3	4	5	6	8	10	12
6	0.282	0.431	-	-	-	-	-	-
8	0.314	0.481	1.113	-	-	-	-	-
10	0.345	0.531	1.209	2.122	-	-	-	-
12	0.377	0.581	1.306	2.273	3.515	-	-	-
(14)	0.409	0.631	1.403	2.424	3.712	-	-	-
16	0.441	0.681	1.499	2.575	3.909	-	-	-
(18)	0.473	0.731	1.595	2.726	4.107	-	-	-
20	-	0.781	1.691	2.877	4.304	-	-	-
(22)	-	0.831	1.787	3.028	4.502	8.672	14.56	-
25	-	0.901	1.934	3.254	4.798	9.232	15.46	-
(28)	-	0.971	2.079	3.481	5.094	9.793	16.37	26.62
32	-	1.064	2.272	3.783	5.489	10.540	17.58	28.61
(36)	-	1.172	2.465	4.085	5.884	11.290	18.79	30.61
40	-	1.271	2.658	4.387	6.278	12.040	19.99	32.61
(45)	-	1.395	2.920	4.764	6.772	12.970	21.60	35.10
50	-	1.518	3.141	5.142	7.265	13.910	23.01	37.60
(55)	-	1.642	3.383	5.510	7.759	14.840	24.52	40.09
60	-	1.765	3.624	5.897	8.252	15.780	26.03	43.08
70	-	-	-	6.652	9.239	17.650	29.05	47.57
80	-	-	-	7.407	10.220	19.520	32.07	52.56

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

Corresponds to DIN 7964.