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 5915-01-076-4538
NSN 7035-01-059-5114
NSN 2925-01-473-9544
NSN 7035-00-870-0290
NSN 5965-01-088-1761
NSN 5905-00-068-7492
NSN 5930-00-006-0611
NSN 6685-01-656-3886
NSN 6620-01-571-0900
NSN 5895-01-442-0657
NSN 4140-00-108-5688
NSN 5855-01-420-4988