GB/T 70.3-2008: Hexagon socket countersunk head screws

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Scope

This Part specifies the hexagon socket countersunk head screws with. thread size is
M3~M20; performance grades are 8.8, 10.9, and 12.9; and product grade is A.
NOTE. Special attention shall be paid to the note in Table 2, and to the provisions in Table 3 relating to
tensile load.
If other technical requirements are required, it shall select from existing standards (such as
GB/T 196, GB/T 3106, GB/T 3098.1, and GB/T 3103.1).

Basic Data

Standard ID	GB/T 70.3-2008 (GB/T70.3-2008)
Description (Translated English)	Hexagon socket countersunk head screws
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	J13
Classification of International Standard	21.060.10
Word Count Estimation	10,133
Date of Issue	2008-08-25
Date of Implementation	2009-02-01
Older Standard (superseded by this standard)	GB/T 70.3-2000
Adopted Standard	ISO 10642-2004, 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 M3 ~ M20, performance rating of 8. 8, 10. 9 and 12. 9, product grade A grade hex head screws. Note: Special attention to Table 2 and Table 3 provisions on tensile loads. For additional technical requirements. Should current standards (such as GB/T 196, GB/T 3106, GB/T 3098. 1 and GB/T 3103. 1) in the selection.