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 5990-00-560-7923
NSN 5950-01-128-1018
NSN 5895-01-147-4767
NSN 6620-01-552-2889
NSN 6320-00-242-3300
NSN 5950-01-459-7429
NSN 5925-01-659-4467
NSN 5960-01-181-2143
NSN 5996-00-525-1777
NSN 5835-01-373-9506
NSN 5996-01-103-2001
NSN 5985-00-411-0440