Description
Military Standard Aircraft Machine Bolt
• Hexagon head
• Undrilled head
• No Cotter Pin hole
• Fine threads
• UNF-3A
• Material: Steel
• Major diameter: 0.4375 inches
• Thread per inch (TPI): 20
• Grip length: 3.938 inches
• Industry standard specification: AIA/NAS NASM3-20
