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 6145-01-653-6445
NSN 5965-01-174-6995
NSN 6105-00-975-4011
NSN 5990-00-741-9775
NSN 5835-00-804-0569
NSN 2925-01-326-0908
NSN 5930-01-010-3283
NSN 5965-00-716-7078
NSN 6130-00-651-7326
NSN 6620-01-104-5758
NSN 5835-00-841-2650
NSN 5998-00-490-1656