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The QA1 left-hand jam nut with 1/2–20 threads is a steel locking nut sized with a 3/4-inch hex and 5/16-inch thickness for reversed-thread applications. It secures a mating fastener to reduce the chance of loosening. QA1 offers this style in steel or aluminum with standard and metric options and a clear-anodized finish; sold individually to supply durable threaded hardware for assemblies and repairs.
QA1 Jam Nut - 1/2-20 Left Hand - 3/4in Hex 5/16in Wide - Steel
