Copper Wire OnlyWire Range with Wire Binding Screw: #10 – #14 AWG (solid recommended)Application torque: 20 in. lbs9/16 CentersElectrical Ratings: 30A with Listed ring lug or unprepared wire, (Based on NEC Table 310-16, 75C columns) 600 Volts AC/DC (UL 1059 Class C, User Group – General Industrial) Short Circuit Current Rating: 10,000A (Default) Approved for Factory and Field Wiring.Mechanical Ratings: Storage and transportation temperature range: -35C to 110C (-31F to 230F)* Maximum insulator base temperature: 150C (302F)* UL RTI Flammability rating of insulator base: UL 94V-0* Use outside these ratings needs to be judged in the end-use application.Materials: Connector (Contact): Brass, tin plated. Insulator base: Phenolic Drive screw (Rivet): Stainless steel Screw, #8-32 Binder head, Phil-Slot: Steel, nickel platedAgency Approvals: UL Recognized, UL 1059 Terminal Block Standard, File No. XCFR2.E62806 CSA Certified, CSA C22.2 No. 158, File No. LR19766 CE compliant, IEC 60947-7-1