3a thread class right-hand straight pan head style 1.3125" grip length 28 thread quantity per inch pin-rivet, threaded, shear, protruding head, hex point drive unjf thread series
Used on aew&c 737 aircraft. 0.292" overall width grommet item purchased in standard stock lengths of 19", then cut to length; specific matl is plastic polyamide, type 6 iaw l-p-410 or astm D4066, PA0211; max operating temp is 150 deg f; this matl has greater flexibility characteristics than the type 6-6
2a thread class right-hand 5.00" thread length hexagon head style 13 thread quantity per inch oem earnest machine products company rocky river, oh.pn is 690564t unc thread series