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 5835-00-269-2232
NSN 5975-00-305-8740
NSN 5985-00-854-0849
NSN 6135-00-078-9931
NSN 5925-00-374-4852
NSN 5950-01-513-9995
NSN 5935-00-238-7428
NSN 4140-01-048-4424
NSN 6220-01-197-5668
NSN 5855-00-631-4565
NSN 5915-01-549-9291
NSN 5985-01-411-6301