Used on submarine acoustic sonar systems; seawolf class ssn; aircraft, awacs, e-3a; towed array handling equipment; los angeles class ssn (688); submarine surveillance systems; periscope, type 18; aircraft, stratofortress b-52; tank, abrams m-1. 2a thread class 32 thread quantity per inch weapon system essential uns thread series
2a single mounting facility thread class 0.410" single mounting facility thread length 3.247" overall length tap, circular, bushing mount unef single mounting facility thread series