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 5905-01-363-4559
NSN 6610-00-886-9140
NSN 5910-01-452-4986
NSN 4140-01-145-8823
NSN 6105-00-289-9993
NSN 5855-00-973-5717
NSN 6645-00-628-6515
NSN 5895-00-303-5260
NSN 6610-01-641-7834
NSN 5960-01-071-0389
NSN 5855-01-444-3916
NSN 5996-01-604-9653