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 6220-00-255-5652
NSN 5935-01-516-3576
NSN 5945-00-639-0646
NSN 5920-01-651-9830
NSN 5999-00-299-1207
NSN 5920-01-531-2817
NSN 6240-00-660-8849
NSN 6240-01-644-7623
NSN 6130-00-177-6466
NSN 5855-01-253-6076
NSN 5935-00-829-9904
NSN 5920-00-170-4247