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 6645-01-206-4888
NSN 6645-01-561-8760
NSN 6620-00-967-9684
NSN 5950-00-998-7002
NSN 5950-01-458-2499
NSN 6220-01-011-0865
NSN 5920-01-436-5138
NSN 5985-00-647-4998
NSN 5835-00-447-1924
NSN 5920-00-387-5312
NSN 6130-00-635-9853
NSN 6145-01-441-7190