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 5945-01-650-0737
NSN 6650-00-056-1581
NSN 6320-00-790-4844
NSN 5905-00-553-9985
NSN 5855-00-548-4742
NSN 6145-01-094-0929
NSN 6685-00-955-1232
NSN 5985-01-102-7047
NSN 5990-01-370-4785
NSN 5925-01-100-4029
NSN 5910-00-447-4315
NSN 5996-00-916-3038