"USED ON CH3 AIRCRAFT,PLASTIC,POLYAMIDE PER L-P-410,0.580 IN. LG,1.027 IN. MIN,1.037 IN. MAX OD,12.0 DEG SURFACE BEVEL,0.750 IN. ID,0.210 IN. DEEP COUNTERBORE,0.030 IN.-45.0 DEG BASE EDGE CHAMFER,THD DATA,1/4-20 UNC 2B THROUGH CENTERLINE,1 EACH SCREW P/N AN515DD416-5"