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 5855-00-933-9978
NSN 6620-00-608-1480
NSN 5950-00-364-0764
NSN 6685-00-102-7769
NSN 5895-01-535-6456
NSN 5855-00-973-5717
NSN 6610-01-472-2757
NSN 6135-01-463-2445
NSN 5990-01-347-6080
NSN 6610-00-209-4372
NSN 6685-01-504-6085
NSN 6105-00-681-6261