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 6240-01-152-2662
NSN 6220-01-485-9737
NSN 5996-01-184-9442
NSN 5965-00-486-7907
NSN 6645-01-298-4662
NSN 6135-00-297-8873
NSN 6145-01-476-7554
NSN 5935-01-368-3793
NSN 5996-01-644-8386
NSN 6135-00-078-9931
NSN 5960-00-089-1632
NSN 5905-00-732-3776