Military Standard Aircraft Machine Bolt
- Hexagon head
- Undrilled head
- Cotter Pin hole
- Fine threads
- UNF-3A
- Material: Steel
- Major diameter: 0.19 inches
- Thread per inch (TPI): 32
- Length: 0.781 inches
- Grip length: 0.375 inches
- Industry standard specification: AIA/NAS NASM3-20