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 5985-01-381-1813
NSN 5920-01-022-5083
NSN 5920-00-253-0291
NSN 5915-01-247-3558
NSN 5925-00-429-2690
NSN 5975-00-908-9478
NSN 5925-01-123-9866
NSN 5915-00-189-1323
NSN 5895-00-456-0830
NSN 5925-01-640-7347
NSN 6220-01-615-8186
NSN 5895-00-141-9127