Military Standard Aircraft Machine Bolt
- Hexagon head
- Undrilled head
- No Cotter Pin hole
- Fine threads
- UNF-3A
- Material: Corrosion resistant steel
- Major diameter: 0.19 inches
- Thread per inch (TPI): 32
- Grip length: 0.625 inches
- Industry standard specification: AIA/NAS NASM3-20