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 5855-00-004-0904
NSN 5910-01-615-8430
NSN 5990-01-443-2931
NSN 5965-01-649-9293
NSN 6320-00-483-0451
NSN 4140-00-009-3586
NSN 5945-01-292-5858
NSN 6645-01-366-5033
NSN 6685-01-024-4329
NSN 6240-01-327-4120
NSN 6610-01-269-5437
NSN 5895-01-023-0522