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 6105-00-231-4370
NSN 5895-01-323-1411
NSN 5855-01-208-1471
NSN 5920-01-464-4622
NSN 6685-01-485-2314
NSN 6645-01-383-1083
NSN 5895-00-644-5712
NSN 5990-00-903-8672
NSN 6110-01-607-7156
NSN 6145-01-423-8470
NSN 6620-01-480-3407
NSN 5998-01-081-3365