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 5855-00-288-1408
NSN 6105-01-654-0158
NSN 5990-01-160-6978
NSN 5915-00-821-6148
NSN 5950-00-009-7898
NSN 5925-00-856-4818
NSN 5930-00-985-4780
NSN 5975-01-575-8127
NSN 7035-00-360-2008
NSN 6145-01-574-0900
NSN 6645-01-027-3838
NSN 5920-01-142-7554