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 5999-01-036-4780
NSN 6650-01-267-9886
NSN 5930-01-272-4360
NSN 5925-00-052-5874
NSN 6645-01-354-7624
NSN 5965-01-437-8442
NSN 5960-00-701-2179
NSN 6650-01-590-9344
NSN 6135-00-284-1406
NSN 6620-00-888-3179
NSN 6685-00-138-2739
NSN 4140-01-139-6192