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 5895-00-225-9589
NSN 2925-01-657-9741
NSN 4140-01-409-1764
NSN 6610-00-382-0266
NSN 6150-01-296-6111
NSN 5965-01-381-2998
NSN 5855-01-141-5190
NSN 6650-01-492-3399
NSN 6620-00-500-0041
NSN 6685-01-026-0111
NSN 6110-01-393-0895
NSN 6145-01-289-7863