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The QA1 left-hand jam nut with 1/2–20 threads is an aluminum locking nut featuring a 3/4-inch hex and 5/16-inch thickness for reversed-thread applications. It secures a mating fastener to help prevent rotation. QA1 offers this style in steel or aluminum and provides standard and metric options plus clear-anodized finish; sold individually to complement threaded hardware and repair kits.
QA1 Jam Nut - 1/2-20 Left Hand - 3/4in Hex 5/16in Wide - Aluminum
