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 5985-01-386-6292
NSN 6110-00-382-5472
NSN 5965-01-657-4519
NSN 6685-01-139-0270
NSN 6105-00-401-5379
NSN 5990-01-235-8404
NSN 5998-01-607-0282
NSN 5996-01-153-8700
NSN 5925-00-482-5779
NSN 6220-01-370-0831
NSN 6320-01-129-9656
NSN 5925-00-834-0272