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 5935-01-422-1396
NSN 5996-00-061-0336
NSN 6240-01-334-6106
NSN 5990-01-510-1430
NSN 4140-00-203-3870
NSN 6150-00-279-3183
NSN 5920-01-249-2708
NSN 6685-01-231-6336
NSN 5985-01-435-7364
NSN 5998-00-298-2180
NSN 5915-01-209-2788
NSN 5965-01-067-9280