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 5975-01-160-5183
NSN 7035-01-538-5759
NSN 7035-01-007-1802
NSN 6150-01-174-6381
NSN 6240-00-617-9599
NSN 5996-01-552-4224
NSN 6240-00-064-4064
NSN 6240-01-621-2774
NSN 5998-01-324-8776
NSN 5935-01-653-9827
NSN 5855-00-316-5050
NSN 5895-01-551-4126