therefore nylock nuts should be discarded and replaced after each use.Ī variety of locking nuts available in ready stock with us.Okay, if you had a bolt that was hollow, at least through the head and a portion of the shank, you could install a microprocessor and some kind of strain sensor and a power source and a squib, so after X number of tension cycles, the squib would blow out a dye charge or an indicator pin to say 'end of life' for that bolt and any associated nuts.ĭoing the same for the nut alone seems more difficult, but I can't say it's impossible.

Inspect the nylon insert of the lock nut to ensure that it is intact after installation.Ĭaution – A nylock nut should only be used once and the nylon insert no longer performs its function to 100% of design. Nyloc nuts retain their locking ability up to 250 ☏ (121 ☌).Īlways fix a Nylock Nut with the metal thread going on first. The nylon insert locks the nut by friction against the screw under the applied radial compressive force. The insert deforms elastically over the threads of the screw, without having threads in turn cut into it. The plastic insert is placed at the end of the nut, with an inner diameter (ID) slightly smaller than the major diameter of the screw. This gives a nylon lock nut a distinct advantage over a lock washer when the bolt or threaded stud is subject to vibration, as the nylon lock nut is unaffected by vibration. When you install the nylon lock nut onto a bolt or threaded stud, the nylon insert wraps around the threads and locks the nut in place. The nylon insert is located in a tapered section located at the back of the nut. Nylon lock nuts differ from a standard hex nut in that they have a nylon insert secured within the nut. Nyloc NutĪ nyloc nut, also referred to as a nylon-insert lock nut, polymer-insert lock nut, or elastic stop nut, is a kind of locknut with a nylon collar insert that resists turning. Self Locking nuts contain some arrangement that provides resistance to becoming loose during service conditions.

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Nylock nut installation