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 5905-01-023-0267
NSN 5935-00-776-7951
NSN 5996-01-566-0344
NSN 6645-00-171-9639
NSN 6645-01-388-7364
NSN 6610-00-230-8675
NSN 4140-01-434-3013
NSN 5910-01-433-3143
NSN 6145-01-439-8041
NSN 5990-01-212-0911
NSN 5930-01-114-2752
NSN 5950-01-337-1404