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 6610-00-510-2906
NSN 5910-01-494-0592
NSN 6110-00-269-2696
NSN 5855-01-033-1375
NSN 5960-00-105-3656
NSN 5985-00-507-2572
NSN 5960-01-602-6009
NSN 4140-00-950-6951
NSN 5960-00-584-4553
NSN 6645-00-232-4070
NSN 5960-01-142-1995
NSN 6620-01-231-9731