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 6130-01-555-4087
NSN 6220-00-529-8415
NSN 6110-01-532-7870
NSN 6320-00-036-3688
NSN 6610-01-633-4179
NSN 5935-01-411-3164
NSN 5855-00-832-9341
NSN 5975-01-222-9617
NSN 6320-01-335-8336
NSN 6240-01-084-3952
NSN 5945-00-482-5771
NSN 5998-01-554-5361