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 6145-01-115-0859
NSN 6135-01-202-8113
NSN 5905-01-463-8665
NSN 5925-01-245-9661
NSN 5945-01-173-8389
NSN 5999-01-514-4504
NSN 5910-00-565-4796
NSN 5835-01-502-9228
NSN 6620-01-559-1921
NSN 5910-00-212-5969
NSN 5930-00-540-9232
NSN 6610-01-497-6365