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 5835-01-398-3859
NSN 6130-01-625-7809
NSN 6145-01-157-2042
NSN 5930-00-890-0698
NSN 6685-01-648-2179
NSN 6145-01-281-7222
NSN 5915-01-441-0388
NSN 6240-01-267-1531
NSN 6650-01-384-1657
NSN 5905-01-197-2517
NSN 6150-01-224-2202
NSN 6320-01-384-3850