12 BOLT HOLES WITH CORNER AND SURFACE NOTCH REFERENCE STANDARD (Inch Version) COPPER

12 HOLE REFERENCE STANDARD. HOLE SIZES: 1/8", 5/32", 3/16", 7/32" 1/4", 5/16", 3/8", 7/16", 1/2", 9/16" 5/8", 3/4", 0.030" x 0.030" CORNER NOTCH 0.008", 0.020", 0.040" SURFACE NOTCHES. 0.005" +/-.001"

DIMENSION: 6" (L) x 2.5" (W) x 0.25" (T)

Holes SIZE: Ø1/8", 5/32", 3/16", 7/32" 1/4", 5/16", 3/8", 7/16", 1/2", 9/16" 5/8", 3/4"

Surface Notches: Qty 3 @ 0.008", 0.020", and 0.040" deep x 0.750" long X 0.005" wide

Hole Notch Configurations: 0.03" x 0.03" (45°) corner notch @ 0.005" wide in each hole

MATERIAL: COPPER.

NOTE:  For special alloy request by mail.