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 6620-00-025-1889
NSN 6620-00-239-0611
NSN 5945-01-131-8064
NSN 5999-01-563-7527
NSN 5965-01-236-9988
NSN 5925-00-529-3950
NSN 6650-01-222-1749
NSN 5905-00-247-9730
NSN 6685-01-344-7273
NSN 6645-01-154-9647
NSN 6145-01-136-9639
NSN 5835-01-602-0311