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Drejtoria e Përgjithshme e Standardizimit

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ISO/CD 25963

Aerospace — Test bolts, hexagonal head, UNJF threads, metallic material, coated or uncoated

General information

Current stage: 30.99 Effective date: Jan 22, 2026

Originator: ISO

Owner: ISO/TC 20/SC 4

Type: International Standard

Scope

This standard describes the dimensions of hexagonal head bolts, with large tolerance normal shank and UNJF threads, in metallic material (alloy steel, CRES and titanium alloy, etc.), coated or uncoated. It is applicable to be used as a test bolt for torque-tension tests of self-locking nuts and threaded collars to determine locking torque, breakaway torque and preload.

Life cycle

NOW

IN_DEVELOPMENT
ISO/CD 25963
30.99 CD approved for registration as DIS
Jan 22, 2026