1.140" hole diameter 1.397" outside diameter 0.059" material thickness mark part per ps-M428 fscm 11599, this item has been designated to be anengineering critical acft engine item oxide film surface treated key
0.256" hole diameter 0.374" outside diameter 0.030" material thickness 2 external keys with 0.047 in holes, 0.266 in from center, spaced 2 keys apart one above internal key cadmium surface treated key