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 6105-01-318-0574
NSN 5950-01-134-2666
NSN 5925-01-120-3837
NSN 4140-01-580-2319
NSN 5915-01-353-4099
NSN 5835-01-375-8930
NSN 6320-00-701-0437
NSN 7035-01-077-6041
NSN 6110-00-389-6600
NSN 6150-01-379-7332
NSN 6685-01-306-4747
NSN 2925-01-054-3190