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 5935-01-176-8248
NSN 6645-01-379-7725
NSN 5985-01-440-2813
NSN 5835-01-158-6878
NSN 5960-00-549-3760
NSN 5935-01-478-0217
NSN 5950-00-119-1436
NSN 5925-01-378-6857
NSN 6650-00-438-1914
NSN 6130-00-156-3029
NSN 6620-00-959-6614
NSN 6130-01-641-9514