2a first mounting facility thread class 12 single mounting facility thread quantity per inch anodize surface treated cylindrical un single mounting facility thread series
2b thread class right-hand 2.569" overall length 1.156" overall width 20 thread quantity per inch cadmium surface treated straight type w/cable clamp unef thread series
Used on 2350-00-873-5408 armored reconnaissance-airborne assault vehicle. 2b thread class right-hand 1.125" overall length 20 thread quantity per inch nickel surface treated straight type unef thread series