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 5950-01-014-1787
NSN 5930-01-023-8931
NSN 5835-01-449-7511
NSN 5915-01-592-6372
NSN 5910-01-406-4317
NSN 6145-01-555-8131
NSN 5930-00-833-6704
NSN 6610-01-144-4228
NSN 6685-00-867-0467
NSN 6135-00-309-0074
NSN 6620-01-597-9815
NSN 5905-01-213-7617