A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 5950-01-345-1457
NSN 5998-01-373-2845
NSN 6105-00-733-9226
NSN 6110-01-140-9671
NSN 5965-01-038-8081
NSN 6650-01-207-2905
NSN 5935-00-884-6501
NSN 5965-01-555-8775
NSN 5935-00-493-1891
NSN 2925-01-415-0264
NSN 5895-01-558-1075
NSN 5950-00-299-4467