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 6105-00-283-2849
NSN 2925-00-491-3549
NSN 6685-01-303-7498
NSN 6105-00-369-6062
NSN 5930-00-177-2190
NSN 6645-01-627-6629
NSN 5855-01-184-8089
NSN 5996-01-151-1611
NSN 6145-01-584-5884
NSN 5915-01-282-9847
NSN 6130-00-978-8987
NSN 6150-01-386-5995