Product Number:SP-38-FProduct Type:Shaft CollarStyle:Two-Piece ClampMaterial:1215 Carbon SteelFinish:Black OxideManufacturer:Ruland ManufacturingUPC Number634529021293Country of Origin:USADimensionsBore B:2. 3750 inOuter Diameter OD:3 1/2 inWidth W:0. 750 inClearance Diameter C MAX:3. 707 inScrew Location R:1. 484 inFastening HardwareForged Clamp Screw:5/16 - 24Number of Screws:2 eaScrew Material:Alloy SteelScrew Finish:Black OxideSeating Torque:325 lb-inHex Wrench:1/4 inAdditional InformationBore Tolerance:+. 002 in / +. 0005 inWidth Tolerance:+. 003 in / -. 010 inTemperature Range:-40°F to 350°F-40°C to 176°CWeight:1. 04 lbsCertifications/ StandardsISO 9001: 2008CertifiedConflict MineralsCompliantRoHS2:CompliantREACH:Compliant