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 6610-01-010-3915
NSN 5960-00-833-9154
NSN 6650-01-181-6037
NSN 6135-01-014-9755
NSN 2925-00-934-8383
NSN 5999-01-262-5899
NSN 6320-01-399-6177
NSN 6645-01-315-2010
NSN 6685-01-514-8589
NSN 6645-01-516-9431
NSN 6320-01-425-1417
NSN 5855-01-179-2702