Aluminum alloy, qq-a-250/5 2024-t3; paint, acrylic lacquer, gloss, color insignia no. 17875, 0.008 in. Material thk, skin; aluminum alloy, gc100b29e 5052 gr a fscm 26512, 0.234 in. Thk; aluminum alloy, qq-a-250/5, 0.012 in. Thk and 0.016 in. Thk doublers; includes plug spacers and sleeve spacers