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 5925-01-535-5178
NSN 6130-01-449-0458
NSN 5945-01-137-8707
NSN 5950-00-929-4910
NSN 6110-00-759-8317
NSN 5999-00-990-8837
NSN 5905-01-361-9076
NSN 6240-00-881-9624
NSN 5930-01-351-5038
NSN 5999-01-101-1769
NSN 5920-01-085-8374
NSN 5975-01-517-8254