MIL-PRF-29602 §4.5.8 Cleaning Efficiency Test Coupons
Test coupons used in quality conformance testing by MIL-PRF-29602 §4.5.8 (Cleaning Efficiency). The test coupons are made of aluminum or stainless steel. Each coupon is 1" x 4" x 1/4", with a rectangular depression 0.75" x 2.75" x 1/16" located 3/8" from one end. The test method uses at least three test coupons for each test. Custom test coupons for modified versions of this test method are available on request.