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 5998-00-412-0525
NSN 6110-00-349-2008
NSN 5975-00-548-4133
NSN 2925-01-337-2508
NSN 7035-00-631-3782
NSN 6145-01-121-4371
NSN 5960-01-020-1404
NSN 5945-01-187-9245
NSN 5950-00-741-2811
NSN 5990-01-360-0711
NSN 5999-01-272-0139
NSN 5905-01-442-7682