A563 Grade A Zinc Plated Steel Prime-Line 9075902 Hex Jam Nuts 25-Pack 7/16 in.-14

Prime-Line 9075902 Hex Jam Nuts, 7/16 in.-14, A563 Grade A Zinc Plated Steel, 25-Pack - -. Size: 7/16 inch-14 。 Similar in shape and function to a standard finished hex nut but is about half as thick 。 Used as a second nut to "jam" or prevent the main nut from loosening 。 Can also be used in place of a standard finished hex nut in cases where a standard nut will not fit 。 If using one thin nut and one standard nut, the thinner nut goes in first 。 The term "jam nut" comes from its use as a secondary nut that jams the main nut. Jam nuts help to prevent loosening in cases where the bolt may be subject to vibration. In situations where you need to fasten a threaded rod or hanger bolt, a jam nut can be tightened against a regular nut in order to create a place for a wrench to be used. They can also take the place of a standard nut in cases where there is not enough exposed thread to support the thickness of a standard nut. 。 。 。