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 6105-01-297-2321
NSN 6320-01-449-1014
NSN 6620-01-369-3589
NSN 2925-00-486-8640
NSN 5905-01-281-7653
NSN 6130-01-537-0159
NSN 6645-00-470-5310
NSN 2925-01-359-4027
NSN 2925-00-010-9609
NSN 5950-01-039-1338
NSN 5975-01-461-5029
NSN 5925-00-852-7809