3a single threaded bushing thread class 0.556" single threaded bushing thread length 18 single threaded bushing thread quantity per inch unf single threaded bushing thread series
2a single mounting facility thread class 0.375" single mounting facility thread length 2.668" overall length 1.312" overall width circular wafer, bushing mount unef single mounting facility thread series
2a single mounting facility thread class 0.375" single mounting facility thread length 1.312" overall length 1.250" overall width circular wafer, bushing mount unef single mounting facility thread series
2a single mounting facility thread class 0.422" single mounting facility thread length 1.547" overall length 1.250" overall width circular wafer, bushing mount unef single mounting facility thread series