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 6645-01-059-2712
NSN 5920-00-795-6665
NSN 5855-00-532-0025
NSN 6685-00-488-6912
NSN 6110-00-930-4060
NSN 5960-01-649-1341
NSN 5835-01-537-1228
NSN 5925-01-241-0572
NSN 2925-01-076-5219
NSN 5920-01-379-7475
NSN 4140-01-287-3707
NSN 6130-00-205-1714