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 5905-01-519-4963
NSN 6320-01-333-5782
NSN 5950-01-453-7312
NSN 5855-01-379-9978
NSN 5975-01-188-7460
NSN 6645-00-551-8291
NSN 5965-01-104-5102
NSN 6150-00-832-6956
NSN 5950-01-124-5516
NSN 5935-00-581-3962
NSN 6145-00-125-5297
NSN 5975-01-077-7119