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 6240-01-484-3019
NSN 6220-01-651-3040
NSN 6240-01-537-5843
NSN 7035-01-559-0240
NSN 5996-01-283-9351
NSN 6135-01-086-0809
NSN 6150-00-942-9239
NSN 2925-01-094-4771
NSN 6620-01-067-8336
NSN 6105-01-597-3447
NSN 6130-01-608-5496
NSN 5895-00-199-0515