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 6110-01-330-7354
NSN 6610-00-867-6420
NSN 6650-00-842-5463
NSN 5935-01-412-0937
NSN 6685-00-135-1353
NSN 5985-01-018-6971
NSN 5905-01-233-5094
NSN 5996-01-142-9125
NSN 5915-01-409-2926
NSN 4140-01-055-6355
NSN 6620-00-929-1188
NSN 5990-01-127-1108