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 6620-00-199-8734
NSN 6135-01-498-7945
NSN 6685-00-617-3733
NSN 5915-01-067-8365
NSN 2925-00-623-3103
NSN 5930-00-391-4101
NSN 5999-00-158-5118
NSN 5930-00-456-0889
NSN 6240-00-635-9953
NSN 6130-01-148-0083
NSN 6620-01-175-5922
NSN 6130-01-621-9757