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 5998-01-032-5590
NSN 5990-00-079-5406
NSN 5975-01-238-8758
NSN 5930-01-006-6622
NSN 6220-00-397-6910
NSN 6610-01-569-9086
NSN 6610-00-922-9423
NSN 6320-00-646-3311
NSN 6110-00-617-0574
NSN 5905-01-098-0832
NSN 7035-00-849-5526
NSN 5910-00-567-5822