GB/T 1231-1991Specifications of high strength bolts with large hexagon head, large hexagon nuts, plain washers for steel structures (English PDF)
钢结构用高强度大六角头螺栓、大六角螺母、垫圈技术条件
GB/T 1231 | Evolution and historical versions
| Std ID | Title | Status |
|---|---|---|
| GB/T 1231-2024 | High strength bolts with large hexagon head assemblies for steel structures | Valid |
| GB/T 1231-2006 | Specifications of high strength bolts with large hexagon head, large hexagon nuts, plain washers for steel structures | Obsolete |
| GB/T 1231-1991 | Specifications of high strength bolts with large hexagon head, large hexagon nuts, plain washers for steel structures | Obsolete |
GB/T 1231-1991 is obsolete. It has been replaced by GB/T 1231-2006. This page sells the obsolete edition, for projects and contracts that still cite it.
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Issued by
State Bureau of Technical Supervision
Level / Type
National · Recommended
Issue date
April 22, 1991
Implementation date
January 1, 1992
Scope
GB/T 1231-1991 is the English-translated version of 钢结构用高强度大六角头螺栓、大六角螺母、垫圈技术条件.
GB/T 1231-1991 is the Chinese national standard "Specifications of high strength bolts with large hexagon head, large hexagon nuts, plain washers for steel structures".
It was issued on April 22, 1991 by the State Bureau of Technical Supervision, and took effect on January 1, 1992. It is obsolete: it has been replaced by GB/T 1231-2006.
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Document preview — GB/T 1231-1991
National Standard of the People's Republic of China
Issued by: State Bureau of Technical Supervision
Contents
- Document data
1 Document data
Sector: National standard (Recommended).
Issuing body: State Bureau of Technical Supervision.
Date of issue: 1991-04-22.
Date of implementation: 1992-01-01.
Status: obsolete, replaced by GB/T 1231-2006.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — all pages — is available in the English PDF.
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