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 5999-01-050-9496
NSN 6240-01-512-1856
NSN 5985-01-025-5013
NSN 6650-00-086-1571
NSN 5930-01-479-9519
NSN 5990-00-843-4852
NSN 6645-00-947-0625
NSN 5925-01-516-2823
NSN 5996-01-394-1154
NSN 6110-01-328-6604
NSN 4140-01-497-8075
NSN 6320-01-550-3420