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 6320-01-346-5158
NSN 5950-00-700-6043
NSN 6685-01-168-5723
NSN 6650-01-215-2762
NSN 6105-00-088-2917
NSN 4140-01-591-4012
NSN 5855-01-507-9742
NSN 7035-00-557-5570
NSN 7035-00-104-7613
NSN 6135-00-078-9931
NSN 5925-01-023-6900
NSN 5996-00-836-7393