Product Information Material: Zinc Plated Steel Thread: SAE O-ring boss Select a Product Part NumberThread Size 1255-08H3/4"-16 1255-12H1-1/16"-12 1255-20H1-5/8"-12 1255-06H9/16"-18 1255-24H1-7/8"-12 1255-04H7/16"-20 1255-32H2-1/2"-12 1255-16H1-5/16"-12 1255-10H7/8"-14
