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This QA1 left-hand jam nut kit contains six aluminum jam nuts with 1/2–20 threads, each machined with a 3/4-inch hex and 5/16-inch thickness for reversed-thread applications. They serve as locking nuts when paired with a mating fastener to resist loosening. Offered in steel or aluminum with standard and metric options and clear-anodized finish, the six-pack provides ready spares for hardware work.
QA1 Jam Nut - 1/2-20 Left Hand - 3/4in Hex 5/16in Wide - Aluminum - 6 Pack
