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 6645-00-456-2219
NSN 6150-00-365-1711
NSN 6650-00-816-6525
NSN 5930-00-833-7689
NSN 5965-01-436-0390
NSN 4140-01-303-2031
NSN 5945-01-560-8968
NSN 5996-00-235-0823
NSN 5910-00-702-8851
NSN 5910-01-484-9277
NSN 5990-01-421-5342
NSN 5835-01-307-2009