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 6220-01-399-6661
NSN 5905-00-546-3737
NSN 7035-00-300-3208
NSN 5998-00-004-1137
NSN 5998-01-490-7328
NSN 5998-01-101-3241
NSN 5945-01-445-6081
NSN 5975-00-383-7679
NSN 6620-00-280-2874
NSN 5930-00-318-9133
NSN 5925-00-863-4232
NSN 6610-00-935-7131