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Resolution of the National Standards Review of the 6th Annual

Posted: 2018-12-27Posted by:admin

After the sixth annual meeting of the National Fastener Standardization Technical Committee held in Haiyan, Zhejiang on November 19-20, 2018, a total of six national standards were revised and improved after reviewing the resolution.

The six national standards are:

GB/T 70.6 "hexagon socket head cap screws fine thread"

GB/T 896 "Opening ring"

GB/T 2673.2 "Hexagonal flower-shaped high countersunk head screw"

GB/T 3098.9 "Mechanical properties of fasteners Effective torque steel lock nut"

GB/T 3103.3 "fastener tolerance flat washer"

GB/T 3098.23 "Mechanical properties of fasteners Thread size M42~M72 bolts, screws and studs"

In addition, the meeting also proposed amendments to the National Standard for "Mechanical Properties of Fasteners for Mechanical Resistance and Stainless Steel Bolts, Screws, Studs and Nuts for High Temperatures", "Guidelines for Selection of Mechanical Properties of Fasteners for Stainless Steel and Nickel Alloy Steel Fasteners". It is also recommended to amend it in accordance with the comments of the ISO/TC2/WG17 Working Group meeting and the Italian opinion.

The standard drafting working group will modify and improve according to the review opinions according to the meeting, complete the standard approval draft, and report according to the recommended national standards.