GB/T 1229-2006High strength large hexagon nuts for steel structures (English PDF)

GB/T 1229-2006 is the English-translated version of 钢结构用高强度大六角螺母.

GB/T 1229-2006 — This national standard is corresponding to standard "High Strength Large Hexagonal Nuts for Bolting Structure Production Grade B - Property Classes 8 and 10" (ISO 4775:1984).

It is non-equivalent to the consistency of ISO 4775. This standard replaces standard "High Strength Large Hexagon Nuts for Steel Structures" (GB/ T 1229-1991).

Compared with GB/T 1229-1991, the changes in this standard are listed as follows. - The related styles of dual chamfered nuts of GB/T 1229-1991 have been deleted (Figured "optional style" of Chapter 3 and Data Column M in appendix of GB/T 1229-1991); the code m" of original size has been changed into m' (Chapter 3 of GB/T 1229- 1991).

This standard is one of Contact Sets of Friction-type High Strength Bolt Hexagon Nut and Plain Washer for Steel Structures of Chinese Standard Product Series.

The standards of this series also include. - GB/T 1228-2006 High Strength Bolts with Large Hexagon Head for Steel Structures - GB/T 1230-2006 High Strength Plain Washers for Steel Structures; - GB/T 1231-2006 Specifications of High Strength Bolts with Large Hexagon Head, Large hexagon Nuts, Plain Washers for Steel Structures; - GB/T 3632-1995Type and Dimension for Sets of Torshear Type High Strength Bolt Hexagon Nut and Plain Washer for Steel Structures - GB/T 3633-1995 Technical Requirement for Sets of Torshear Type High Strength Bolt Hexagon Nut and Plain Washer for Steel Structures.

This national standard was proposed by China Machinery Industry Federation.

This national standard shall be under the jurisdiction of National Technical Committee 85 on Fasteners Standardization Administration of China this national standard was drafted by China Academy of Railway Sciences; and the participating organizations of drafting are China Academy of Machinery Science & Technology, Shanghai High Strength Bolts Plant, Central Research Institute of Building and Construction, MCC Group, Daye Special Steel Co., Ltd. This national standard was prepared by Cheng Jiqing and Shen Jiahua.

The previous versions which were replaced by this standard are as follows. - GB 1229-1976, GB 1229-1984, GB/T 1229-1991. 2High strength large hexagon nuts for steel structures 1 Scope This national standard specifies the style and size, technical condition and tagging of the high strength large hexagon nuts whose screw dimension is M12~M30.

This national standard is applicable to the contact sets of friction-type high strength bolt hexagon nut and plain washer for steel structures which are used together with GB/T 1228-2006 High Strength Bolts with Large Hexagon Head for Steel Structures.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 4 pages — is available in the English PDF.

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