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 5915-01-287-5669
NSN 6650-01-324-0351
NSN 5905-00-480-8071
NSN 5965-00-578-8931
NSN 6685-01-230-7983
NSN 6110-01-068-4743
NSN 5998-01-253-1154
NSN 5855-00-256-5562
NSN 2925-00-076-7691
NSN 5910-01-089-7080
NSN 5915-00-155-4766
NSN 5910-00-148-8197