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 5930-01-491-9671
NSN 6110-00-248-7475
NSN 6240-01-548-7901
NSN 2925-01-601-5050
NSN 5895-01-446-4899
NSN 6645-01-535-0719
NSN 5950-01-463-7780
NSN 5975-01-307-9826
NSN 5910-01-494-7716
NSN 5905-01-162-0729
NSN 5950-00-014-6978
NSN 5925-01-401-5314