Hex Lock (Half/Jam) Nuts

Hex Lock Nuts, also called Jam Nuts are thin nuts that lock another hexagon nut in place by clamping without exerting force, when tightened. The Hex Lock Nuts can also be used when a standard Hex Nut would not fit.


  • Metric: Dia M3 - M56
  • Imperial: Dia 1/4" - 1"
  • Threads: Metric Coarse & Imperial BSW, UNC, UNF
  • Strength: Class 5, 8, Grade 2 & A2-70, A4-70
  • Material/Finish: Zinc Plated, Hot Dip Galvanised & Stainless Steel
  • Compliance: AS 1112.4, DIN 439, ANSI B18.2.2