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 6220-01-088-7646
NSN 5915-00-904-9157
NSN 5975-01-291-3314
NSN 5985-00-567-9857
NSN 5985-01-130-9564
NSN 5985-01-158-0638
NSN 6320-01-246-4390
NSN 2925-00-654-3206
NSN 5855-01-103-8650
NSN 5996-00-842-2023
NSN 6105-00-475-7188
NSN 5905-00-094-6850