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 6620-01-411-9489
NSN 5925-01-426-2236
NSN 6145-00-921-7990
NSN 5920-01-345-1582
NSN 5925-01-634-0664
NSN 5835-01-381-2683
NSN 5855-00-477-9943
NSN 5855-01-278-8922
NSN 5925-01-504-7731
NSN 5905-01-634-0595
NSN 6645-01-398-6841
NSN 6645-00-627-1501