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 6130-00-822-4903
NSN 6620-00-722-3875
NSN 5905-01-092-1263
NSN 5895-00-501-1959
NSN 5910-01-575-5264
NSN 6145-00-623-7224
NSN 5925-00-246-4645
NSN 5965-01-050-4133
NSN 6685-01-043-0182
NSN 5945-01-464-6649
NSN 6145-00-873-4808
NSN 4140-01-103-3377