Bolt, Shear, 100° Flat Countersunk Head NAS1580A4R13DY

Technical Description

High-strength precision alloy steel close-tolerance structural shear bolt manufactured to NAS1580 design parameters. Thread metrics follow a right-hand 1/4-28 UNJF-3A tight-tolerance fit class featuring a nominal grip section of 0.8125 inches (13/16") designed to withstand intensive airframe shear forces. Fabricated from premium high-tensile alloy steel delivering a minimum ultimate tensile strength rating of 160,000 PSI. Outfitted with an aerodynamically flush 100-degree flat countersunk head utilizing a high-torque internal offset cruciform Torq-Set recess drive to prevent installation tool cam-out. Features a precision cross-drilled hole (D designator) at the thread extension to facilitate positive safety wire locking or cotter pin retention. Finished with an all-over cadmium plating surface layer to ensure comprehensive galvanic protection and superior long-term corrosion resistance across flight-critical structural linkages.

Component Specifications