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 6145-01-010-3402
NSN 5975-01-657-8445
NSN 5930-01-044-0512
NSN 5985-01-123-9484
NSN 6645-00-069-4381
NSN 5855-01-501-5683
NSN 5930-01-081-8569
NSN 5945-01-594-0571
NSN 6685-01-513-9597
NSN 5925-00-622-2294
NSN 5835-01-632-6627
NSN 5855-00-174-3482