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 7035-01-265-2301
NSN 6685-00-341-1877
NSN 5835-00-286-5432
NSN 6320-00-481-7291
NSN 2925-01-273-4898
NSN 6685-00-101-7197
NSN 5945-01-449-2918
NSN 5930-00-338-9563
NSN 5996-01-478-4860
NSN 6620-01-206-5748
NSN 2925-01-032-3814
NSN 5945-01-240-0413