GB/T 70.1-2008: Hexagon socket head cap screws

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Scope

This part specifies the hexagon socket head cap screws of thread specifications
for the M1.6 ~ M64, performance level of 8.8, 10.9, 12.9, A2-50, A2-70, A3-50,
A3-70, A4-50, A4-70, A5-50, A5-70, CU2 and CU3, AND the product grade A.
As for the reference mass of screw, SEE Appendix A.
If requiring other technical requirements, they shall be selected from the current
standards (GB/T 196, GB/T 3106, GB/T 3098.1, GB/T 3098.6, GB/T 3098.10
and GB/T 3103.1).

Basic Data

Standard ID	GB/T 70.1-2008 (GB/T70.1-2008)
Description (Translated English)	Hexagon socket head cap screws
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	J13
Classification of International Standard	21.060.10
Word Count Estimation	13,121
Date of Issue	2008-08-25
Date of Implementation	2009-02-01
Older Standard (superseded by this standard)	GB/T 70.1-2000
Adopted Standard	ISO 4762-2004, MOD
Regulation (derived from)	National Standard Approval Announcement 2008 No.14 (Total No.127)
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This standard specifies the thread size of M1. 6 ~ M64, performance rating of 8. 8, 10. 9, 12. 9, A2-50, A2-70, A3-50, A3-70, A4-50, A4-70, A5-50, A5-70, CU2 and CU3, product rating for hexagon socket head screws a grade.