HB 321-1971
cylindrical nut (English Version)
- Standard No.
- HB 321-1971
- Language
- Chinese, Available in English version
- Release Date
- 1980
- Published By
- Professional Standard - Aviation
- Status
- Replace By
- HB 321-2008
- Latest
- HB 321-2008
HB 321-1971 history
- 1970 HB 321-2008
- 1980 HB 321-1971 cylindrical nut
