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 5985-01-412-0569
NSN 6610-00-900-7685
NSN 5835-01-342-7975
NSN 6645-00-935-7046
NSN 5905-00-244-7918
NSN 5925-01-375-9044
NSN 6130-01-458-7406
NSN 5895-01-274-5085
NSN 6220-01-360-9659
NSN 5990-01-048-1056
NSN 5950-01-200-7893
NSN 6220-01-625-2328