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 5835-01-157-5886
NSN 6685-01-467-6980
NSN 6110-00-123-7953
NSN 6145-00-715-5262
NSN
NSN 2925-01-033-0141
NSN 5945-01-458-1277
NSN 5985-00-840-7104
NSN 5920-01-053-9797
NSN 6620-01-650-2444
NSN 5925-01-509-0571
NSN 2925-01-424-0235