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 6685-01-522-5773
NSN 5915-01-240-6450
NSN 5998-00-931-5494
NSN 5990-00-027-7508
NSN 6650-00-537-9222
NSN 6220-00-233-7436
NSN 5910-01-054-3727
NSN 5925-01-262-0759
NSN 5965-00-015-3660
NSN 5975-01-331-7001
NSN 5996-01-539-1351
NSN 5910-01-633-9963