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 5975-01-222-5999
NSN 6240-01-303-4595
NSN 5915-00-752-4458
NSN 6130-01-377-2065
NSN 6645-00-700-4892
NSN 7035-01-067-8991
NSN 6130-00-285-8119
NSN 6220-01-215-0907
NSN 6685-01-123-9275
NSN 6105-01-346-2794
NSN 6685-01-212-3259
NSN 5998-01-236-8950