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 5835-01-163-4215
NSN 5990-00-907-3912
NSN 6240-00-372-4841
NSN 5835-00-221-6628
NSN 4140-01-488-3969
NSN 6650-01-633-9147
NSN 6645-01-449-5457
NSN 6320-01-152-8873
NSN 6110-00-409-1115
NSN 5910-01-214-9126
NSN 5950-00-952-1234
NSN 4140-00-038-7577