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 5985-01-245-8524
NSN 5925-01-449-0934
NSN
NSN 6620-00-098-5652
NSN 7035-00-411-8850
NSN 5895-01-419-8170
NSN 5910-01-472-1667
NSN 6105-01-209-6888
NSN 5990-00-946-8587
NSN 5945-00-296-1729
NSN 5945-01-465-6337
NSN 6145-01-429-8529