2b thread class right-hand 4.188" overall length 1.551" overall width 20 thread quantity per inch each adapter shall provision for a dust cap chain attachment nickel surface treated straight type w/cable clamp unef thread series
2a 1st mounting facility thread class 0.500" 2nd mounting facility thread length 4.425" overall length 32 1st mounting facility thread quantity per inch deck identification consists of letter for each deck a thru h located adjacent to common terminal tap, circular, bushing mount unc 2nd mounting facility thread series
2a single mounting facility thread class 0.437" single mounting facility thread length 4.371" overall length tap, circular, bushing mount unef single mounting facility thread series