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AN BOLT SELECTOR

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  • Overview
    Hex head aircraft bolts are made of high-strength type 4037 or 8740 alloy steel (type 8740 is most commonly used). The bolts are center-less ground and threaded after heat treatment. Minimum tensile strength 125,000 PSI. Cadmium plated per specification QQ-P-416A, Type II, Class 3. Available with shank drilled for cotter pin or undrilled for stop nut application, & with or without drilled head for safety wire. Specify bolts to have undrilled shank by adding letter "A" after dash number. For bolts with drilled head add letter "H" after AN number. See illustrated examples. The length of AN aircraft bolts is measured from under the head to the end of the shank. The "grip" is the unthreaded portion of the shank. See table for conversion of length and/or grip to proper AN call-out.
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  • Q+A

    Ask a question

    What is the diameter tolerance on a 3/8-24 AN bolt?
    The max is .374", and min .371"

    What is the safety wire diameter recommended for the drilled version?
    It depends on the application, but both .032 and .041 will fit through the hole.

    On a drilled shank, where is the hole located in reference to the end?
    Per the Tech Data Sheet, the hole location is determined from the start of the threads, on the head side, to the center of the drilled hole. AN3 = 17/64", AN4 = 5/16", AN5 = 23/64", AN6 = 7/16", AN7 = 31/64", AN8 = 39/64".

    What is the difference between stainless and cadmium plated AN bolts?
    Stainless bolts are corrosion resistant for applications where corrosion is a problem. CAD plated bolts are made of steel with CAD plating to help surface corrosion, but it can been worn or chipped off.

    Is the nominal length listed the entire bolt (head, grip and thread) or just the grip and thread?
    The nominal length is the length from under the head to the end of the shank.
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