GB/T 48248-2026Aerospace-nuts, anchor, self-locking, floating, self-aligning, single lug, with MJ threads - Dimensions (English PDF)

GB/T 48248-2026 is the English-translated version of 航空航天用MJ螺纹带沉头窝的成组游动托板自锁螺母 尺寸.

This standard gives dimensions for aerospace anchor nuts of the self-locking, floating, self-aligning, single lug type with MJ threads. These are nut elements that stay attached to a structure and allow a bolt to be fastened with some tolerance for misalignment. It is meant for fastener manufacturers, aerospace designers and structural engineers, and for purchasing and inspection departments that specify and check such hardware.

It adopts an international standard. It was issued on 28 September 2026 and takes effect on 1 January 2027. As a recommended national standard, it is applied through drawings, contracts or company procedures. The MJ thread is a rounded-root metric form used for high-performance aerospace fasteners, and a dimensional standard lets designers draw the nut into a structure knowing that parts from different makers will fit the same envelope. Anyone sourcing aerospace fasteners for Chinese programs can use it to match parts to a common dimensional reference. The scope is limited to dimensions.

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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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