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The QA1 left-hand jam nut with 7/16–20 threads is a steel locking nut featuring an 11/16-inch hex and 1/4-inch thickness for reversed-thread applications. It holds a mating fastener in place to prevent loosening. QA1 lists this style in both steel and aluminum and offers standard and metric options plus clear-anodized finish; sold individually for general threaded hardware use.
QA1 Jam Nut - 7/16-20 Left Hand - 11/16in Hex 1/4in Wide - Steel
