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 5945-00-038-0667
NSN 5920-01-013-8594
NSN 5930-01-340-7968
NSN 5950-00-925-0758
NSN 4140-01-174-4390
NSN 5855-01-506-6767
NSN 5920-00-470-2903
NSN 6150-01-557-1222
NSN 6135-00-488-4478
NSN 6645-01-452-3354
NSN 6105-01-554-7274
NSN 6645-01-521-0424