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 5935-00-193-9680
NSN 5990-01-004-6343
NSN 6220-01-085-0841
NSN 6685-01-029-3773
NSN 5930-01-005-2648
NSN 4140-01-622-6837
NSN 5985-01-474-0027
NSN 5999-01-339-5963
NSN 5996-01-519-3161
NSN 5950-00-753-0955
NSN 4140-01-146-5409
NSN 6645-01-184-0725