Material 5052-h32 iaw qq-a-250/8 (sm1870-21); 0.059 to 0.067 thk for end surface, 0.156 to 0.218 for ctr spts, spotweld iaw mil-w-6858 class c; part marked iaw mil-std-130; dimensions in inches- bottom length 6.845 to 6.875, top length 4.340 to 4.360, top width 4.052 to 4.072
