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 5930-01-587-9897
NSN 5998-01-441-7671
NSN 5925-00-889-2707
NSN 6240-01-456-5413
NSN 6135-01-168-2944
NSN 5985-00-520-3974
NSN 5910-01-403-2812
NSN 5999-01-263-1895
NSN 6320-01-473-9024
NSN 6645-01-277-9297
NSN 7035-00-535-8109
NSN 6240-01-136-1018