MIL-PRF-372 §4.3.1 Weight Change Test Coupons
Metal test coupons used in testing by military specification MIL-PRF-372 §4.3.1 (Allowable Weight Change). This test uses three metal coupons made of aluminum, steel, and copper. Each test coupon is 1" x 1" x 1/32". The test coupons are cleaned but not polished. Each test coupon is individually packaged and lot traceable to the original material.