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 6130-01-216-1217
NSN 5999-01-342-1379
NSN 5930-01-129-3278
NSN 5965-00-999-4334
NSN 5895-01-093-8333
NSN 5835-01-580-0446
NSN 6130-01-240-7078
NSN 5996-01-445-1359
NSN 2925-01-596-9448
NSN 5835-00-518-4507
NSN 5975-00-285-0907
NSN 6130-01-211-5828