Heavy Nylon Insert Lock Nuts (NU)

Nylon Insert Lock Nut or Nyloc Nut is a nut that locks into place by creating pressure on the internal nylon material at the top of the thread against the fastener, so it will not vibrate and become loose. The hex heavy nylon insert lock nut is larger in height and width than a standard nylon insert lock nut.


  • Imperial: Dia 1/4" - 2"
  • Thread: Imperial UNC
  • Strength: Grade 2
  • Material/Finish: Zinc Plated
  • Compliance: ASME B18.16.6 NU Style