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 6320-01-116-3980
NSN 6240-01-570-0478
NSN 5985-00-665-4910
NSN 5895-01-424-0311
NSN 6320-01-397-9995
NSN 5925-01-211-6660
NSN 7035-01-250-5744
NSN 5985-00-168-1607
NSN 5998-01-243-0003
NSN 6620-01-155-6564
NSN 5855-01-191-3404
NSN 5895-00-820-1997