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 6105-00-433-5866
NSN 5930-00-258-5464
NSN 6240-01-142-2963
NSN 4140-00-338-8770
NSN 5998-01-102-9424
NSN 6240-01-307-8236
NSN 2925-01-285-7163
NSN 5895-01-381-1056
NSN 5945-01-064-1390
NSN 5975-00-961-0563
NSN 5835-00-138-7807
NSN 5965-01-609-2518