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 5855-01-154-3871
NSN 5895-00-390-7806
NSN 6650-01-164-5873
NSN 6650-01-530-0589
NSN 6610-00-886-3653
NSN 6110-00-777-8749
NSN 5915-01-110-6387
NSN 4140-00-577-3512
NSN 6105-00-189-0515
NSN 6110-01-248-8178
NSN 6105-01-060-6992
NSN 6240-01-242-4495