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 6320-01-631-7828
NSN 5905-00-564-3611
NSN 5945-00-393-1191
NSN 6150-00-288-6245
NSN 6645-00-350-8070
NSN 5920-00-949-3468
NSN 5990-00-315-9343
NSN 5925-01-494-0085
NSN 5925-00-151-9684
NSN 6150-00-707-8804
NSN 5999-01-502-7101
NSN 5975-00-340-3933