Used on mrap atv. right-hand 18 thread quantity per inch 1.200 in long; head dia. 0.756 in.; max body dia. 0.500 in.; grip range 0.020 - 0.280 in. zinc surface treated unc thread series
delron inserts 604 series- flared threaded with non-metallic lock head style, d-flush; top skin thickness, less than 0.30"; size, 3; thread per mil-s-8879, .1900-32 unjf-3b; head diameter, 0562; sleeve diameter, .375; flare diameter, .225