| GENERAL CHARACTERISTICS ITEM DESCRIPTION | ULTRASONIC; 6.0 IN. W; 6.0 IN. LG; 6 WOVEN GL-EP STEP WEDGES WITH 6 HOLES IN EACH STEP; STEP DIMEN. 0.050, 0.100, 0.200, 0.300, 0.400, AND 0.500; FLAT BOTTOM HOLES, DIMEN: STEP A-ALL HOLES ARE 0.035 IN DP; STEP B-ALL HOLES 0.020 IN DP; STEP C-ALL HOLES 0.005 INDP; STEP D-ALL HOLES 0.045 IN DP; SERD-NO. 1636 |