Hex Jam Nut - 5/16-18 - Low Carbon Steel - Zinc Yellow - UNC - Pkg of 100 - Brighton-Best 331150

Jam nuts provide durable low profile fasteners that are normally half the height of a standard nut, and are tightened against the work surface and used in situations where a standard nut would not fit. a jam nut can also be used with a hex nut to prevent it from loosening for long lasting reliability. nuts are designed to be driven by wrench or pneumatic tools for ease of installation.