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GB/T 48156-2026Aerospace-nuts, barrel, self-locking, floating, self-aligning, with MJ threads - Dimensions (English PDF)

航空航天用MJ螺纹自调心桶形游动自锁螺母尺寸

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Also coversGB/T48156-2026 + GBT48156-2026

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

August 28, 2026

Implementation date

December 1, 2026

Scope

GB/T 48156-2026 is the English-translated version of 航空航天用MJ螺纹自调心桶形游动自锁螺母尺寸.

This standard provides dimensions for aerospace barrel nuts with MJ threads that are self-locking, floating and self-aligning. These are fastening components used in aerospace structures where the nut needs a measure of freedom to align with the bolt. It is relevant to fastener manufacturers, aerospace designers and structural engineers, and to procurement and inspection staff who need a dimensional reference for these parts.

It adopts an international standard. It was issued on 28 August 2026 and takes effect on 1 December 2026. As a GB/T document it is recommended, so it is applied through drawings, contracts and company specifications. A barrel-shaped floating nut sits in a hole or housing and can shift slightly, which compensates for small positional errors between mating parts during assembly. Giving the dimensions in a national standard means that nuts from different makers can be exchanged and that drawings can refer to the part by designation. Anyone buying aerospace fasteners for Chinese projects can use it as a shared basis for describing this nut type.

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Document preview — GB/T 48156-2026

National Standard of the People's Republic of China

ICS: 49.030.99
Classification: V 20

Issued by: State Administration for Market Regulation; Standardization Administration of China

Foreword
1 Scope
2 Normative references
3 Terms and definitions

Foreword

GB/T 48156-2026 is a recommended national standard (GB/T) of the People's Republic of China, issued on 28 August 2026 by the State Administration for Market Regulation and the Standardization Administration of China, with effect from 1 December 2026.

The document adopts an international standard (ISO or IEC).

It is under the responsibility of the Standardization Administration of China.

Classification: ICS 49.030.99; CCS V 20.

1 Scope

Remaining clauses in the full document

2 Normative references
3 Terms and definitions

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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