Cadmium Plated Steel
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AN4H56A Airframe Bolt
The AN4H56A Airframe Bolt features Cadmium Plated Steel and has a 1/4-28 thread with a 1/4” shank diameter. All sizes of AN4H bolts have a 0.469 inch thread length, regardless of grip length. This thread length has been carefully calculated to accommodate a full-height nut plus one AN960-416 washer. The threaded end of the AN4H56A Airframe Bolt is tapered, to allow easier starting of the nut. The AN4H56A Airframe Bolt is tapered on the last threads, for ease of installation of the nut. The AN4H56A Airframe Bolt has a tensile strength of 125,000 psi. If the AN4H AN4H56A Airframe Bolt is overstressed, it will bend first rather than snapping.