Used on m871a322.5 ton semi-trailer system. 2a thread class right-hand 1.000" thread length hexagon head style 16 thread quantity per inch bolt, .38X2.5 unc thread series
Used on mc130h sentin. 2a thread class right-hand 0.750" thread length knurled no. 1 head style 16 thread quantity per inch calls for locking element non specific unc thread series