HB 3912-1987
Inner square screw (English Version)
- Standard No.
- HB 3912-1987
- Language
- Chinese, Available in English version
- Release Date
- 1987
- Published By
- Professional Standard - Aviation
- Latest
- HB 3912-1987
HB 3912-1987 history
- 1987 HB 3912-1987 Inner square screw
