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 5935-00-679-8405
NSN 5975-01-484-5131
NSN 6320-01-531-4997
NSN 5905-01-313-1337
NSN 6145-01-315-5874
NSN 5930-00-212-8866
NSN 5990-01-609-4793
NSN 6620-01-423-5875
NSN 6645-00-664-4665
NSN 5985-00-339-2318
NSN 6130-00-635-9853
NSN 6105-01-492-7354