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 5905-00-935-1142
NSN 6240-01-431-5790
NSN 5996-00-866-7766
NSN 5945-01-201-0000
NSN 5910-01-198-8303
NSN 5960-01-212-8118
NSN 5999-00-293-1718
NSN 5998-01-573-6243
NSN 6685-00-010-3053
NSN 5965-01-170-9891
NSN 6645-00-344-3512
NSN 5935-01-020-9853