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 5855-01-020-7982
NSN 5855-00-089-3974
NSN 5990-01-269-2111
NSN 5990-01-157-0441
NSN 5975-01-377-4878
NSN 6620-01-478-7419
NSN 5990-01-376-0405
NSN 6130-01-519-2620
NSN 6610-00-925-3914
NSN 5950-01-067-4759
NSN 6105-00-988-9274
NSN 5960-01-244-2835