Materials:

Housing: Die cast aluminum, alloy A380 or A384.
Finish: Blue baked enamel paint per Federal Standard 595 #25109 over Phosphoric Etch
Cover: .040” (1,01mm) thick aluminum #1100-H14
Finish: Clear anodized
Screws: Steel, 4 ea. #2-32 x ¼” Pan-held self-tapping.