MIL-PRF-39015-2 Resistors, Variable, Wire-Wound \(Lead-Screw Actuated\), Nonestablished Reliability And Established Reliability Style Rtr22This specification covers the associated requirements for style RTR22, lead-screw actuated, wire-wound, variable resistors. The resistors are available in a ??5 percent resistance tolerance and terminal types L \(inactive for new design\), P, W, and X.