QJ 399-1978
Countersink rivet hole countersinking (rivet diameter = 2.5~6, ψ = 90°, 120°) (English Version)

Standard No.

QJ 399-1978

Language

Chinese, Available in English version

Release Date

1978

Published By

Professional Standard - Aerospace

Latest

QJ 399-1978

QJ 399-1978 history

• 1978 QJ 399-1978 Countersink rivet hole countersinking (rivet diameter = 2.5~6, ψ = 90°, 120°)