6005 Bearingprice

Threads are Unified inch coarse series (UNC, Unified National Coarse) or Unified inch fine (UNF, Unified National Fine) and, being left-hand, are reverse threaded compared to "standard" nuts.

There are two types of left hand nuts commonly available: hex and heavy hex. They cannot be used with right-hand threaded fasteners.

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Left hand nut size refers to its nominal thread diameter. Typically, sizes range from 1/4" to about 2". Size is specified in inches, usually fractional rather than decimal. Not all types are available in all sizes.

Left hand nuts look like regular nuts but are threaded opposite of "standard" (right-hand) nuts. Consequently, turn them counterclockwise to install and tighten. Often abbreviated "LH" for left-hand, use left hand nuts with left hand threaded bolts, screws, studs and threaded rod. They are also known as:

Steel, plain finish, is a common material and finish. (Plain finish is unplated so there is no surface treatment to inhibit rust.)