Military Standard Aircraft Machine Bolt

Military Standard Aircraft Machine Bolt • Coarse Thread • UNC-3A • Drilled Head • Material: Steel • Finish: Cadmium Plate • Major Diameter: 0.25 in. • Threads Per Inch (TPI): 20 • Length: 0.781 in. • Grip: 0.25 in. • Industry Standard Specification: AIA/NAS NASM20074