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 5965-01-474-8265
NSN 6620-00-411-4983
NSN 5960-01-539-1956
NSN 5975-00-464-7535
NSN 6220-01-442-5159
NSN 5935-01-535-9355
NSN 5895-01-457-1317
NSN 5990-00-296-4825
NSN 2925-01-398-6751
NSN 6150-01-490-4458
NSN 5915-01-366-9850
NSN 5945-01-437-5611