1/4"-20 TPI, 1" Dia Head, 303 Stainless Steel, Knurled, Swivel, Thumb Nut Thumb Nut Type Knurled, Swivel Nominal Diameter 1/4 in. TPI 20 Head Diameter 1 in. Head Height 1/4 in. Material 303 Stainless Steel Applicable Standard ISO 9001 Flange Diameter...