SBDs 'POP' Pull Pin | 1/2" Diameter Spring Loaded Plunger  1" Diameter x 1-1/2" Length Weld ON Steel Barrel | Hard Plastic T HANDLE Knob | Knurled Round Nut        Brushed Weld On Stee Barrel 1" Diameter, 1-1/2" Length Knurled Lock Nut zinc Plated. Case Hardened Steel Plunger with reduced end for easy locating.