Standard No.:	GB/T 70.3-2008
Chinese Name:	内六角沉头螺钉
English Name:	Hexagon socket countersunk head screws
Professional Classification:	J13 Fastener
Professional Classification:	GB National Standard
ICS Classification:	21.060.10
Issued by:
Issued on:	2008-08-25
Implemented on:	2009-02-01
Status:	VALID
Replace:	GB/T70.3-2000 Hexagon socket countersunk head screws
Language:	English
File Format:	PDF
Word Count:	5000 words
Price(USD):	150 (USD)
Delivery:	via email in 1-3 business day

This national standard specifies the characteristics of hexagon socket countersunk head screws with threads from M3 up to and including M20, with product grade A and property classes 8.8, 10.9 and 12.9.
Note: Particular attention is drawn to the note in Table 2 and Table 3, concerning the limitation on ultimate tensile load.
If, in special cases, specifications other than those listed in this national standard are required, they should be selected from existing national standards, e.g, GB/T 196,GB/T 3106,GB/T 3098.1 and GB/T 3103.1.