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 5975-01-462-0700
NSN 6620-00-841-0170
NSN 5920-01-040-7718
NSN 6130-01-381-2238
NSN 5945-01-247-0770
NSN 5990-01-548-5979
NSN 5945-00-498-5454
NSN 5960-01-487-2175
NSN 5998-01-552-9824
NSN 6610-00-945-6782
NSN 6320-01-054-3046
NSN 5855-01-306-5655