Military Standard Aircraft Machine Bolt
- Hexagon Head
- Drilled Head
- No Cotter Pin Hole
- Fine Threads
- UNF-3A
- Material: Steel
- Major Diameter: 0.25 in.
- Thread Per Inch (TPI): 28
- Length: 7.406 in.
- Grip Length: 6.938 in.
- Industry Standard Specification: AIA/NAS NASM3-20
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