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 6685-01-596-3952
NSN 5905-01-312-4610
NSN 6240-01-116-5988
NSN 5985-01-045-4706
NSN 5835-01-307-8954
NSN 6650-01-440-5947
NSN 5905-01-380-1536
NSN 6240-00-075-0445
NSN 5855-01-073-6102
NSN 6685-01-541-2140
NSN 5985-01-281-7700
NSN 5925-01-134-2747