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 5998-00-186-8583
NSN 5999-01-285-9436
NSN 5935-00-371-8743
NSN 5895-00-285-6622
NSN 5945-00-389-6311
NSN 5960-01-067-1448
NSN 5905-01-087-4474
NSN 5935-01-616-7347
NSN 6145-01-599-9935
NSN 5960-01-250-1095
NSN 5975-00-438-3168
NSN 5920-00-927-5568