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 5999-01-210-2064
NSN 6620-01-128-3053
NSN 5950-01-360-1489
NSN 5835-01-116-2369
NSN 6240-01-545-3608
NSN 6145-01-646-6272
NSN 6320-01-331-6947
NSN 6105-01-500-0891
NSN 5905-01-592-2456
NSN 5925-01-435-4943
NSN 6685-01-264-6652
NSN 6135-01-633-8502