Zinc Plated Steel Nylon Insert Jam Lock Nuts Nylock Jam Nuts - Size #4 to 1-1/2"
Fastener Type: Nylon Insert Jam Lock Nut. Zinc Plated Steel Nylon Insert Jam Lock Nuts - Size #4 through 1-1/2". Also referred to as Nylon Jam Lock Nuts or Nyloc Jam Nuts. Zinc Plated Steel Nylon Insert Hex Jam Lock Nuts.