Bolt, 100° Flat Countersunk Head NAS1204-11

Technical Description

High-strength precision alloy steel close-tolerance structural bolt manufactured to NAS1204 design guidelines. Thread metrics follow a right-hand 1/4-28 UNJF-3A tight-tolerance fit class featuring a nominal grip section of 0.688 inches (11/16") engineered to absorb intensive airframe shear forces. Fabricated from premium high-tensile alloy steel delivering a minimum ultimate tensile strength rating of 160,000 PSI to maintain critical assembly clamping preloads. Outfitted with an aerodynamically flush 100-degree flat countersunk head utilizing a standard cruciform cross-recess drive system to prevent installation tool cam-out. 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