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 5945-01-600-5845
NSN 6620-00-834-4801
NSN 6220-00-004-1744
NSN 5910-00-762-8811
NSN 2925-00-516-8841
NSN 5945-00-496-6044
NSN 5996-01-011-7470
NSN 5895-00-222-4713
NSN 6240-01-185-5538
NSN 5855-01-406-4821
NSN 5975-01-219-8703
NSN 6240-01-202-5649