plastic material, bearing strip,upper part name assigned by controlling agency, 5.780 inches nominal overall length, 0.470 inches minimum and 0.500 inches maximum overall width, material 0.062 plastic sheet type ii class 1 per l-p-392; 2 holes 0.140 to 0.145 diameter, countersunk 100 deg x 0.280 to 0.290 diameter special features