lead trapezoidal spindle screw with brass nut Tr40x7, Tr40x30-5, Tr40x120-15, Tr41x7, Tr42x7, Tr43x7, Tr43x24-4, Tr44x7, Tr45x7, Tr45x8-2, Tr45.3x20-4, Tr45.95x25-5, Tr46x8, Tr47x8, Tr48x8, Tr49x8.Tr50x8, Tr51x8, Tr52x8, Tr53x8, Tr53x30-5, Tr54x8, Tr55x8, Tr55x9, Tr55x12, Tr55.95x25-5, Tr56x9, Tr56x12, Tr57x9, Tr57x12, Tr58x9, Tr58x12, Tr59x9, Tr59