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 5920-00-584-4592
NSN 5895-01-143-3851
NSN 5999-01-373-1050
NSN 6645-01-499-4798
NSN 5945-01-487-2023
NSN 5998-01-016-9482
NSN 5905-01-369-1741
NSN 5910-01-631-1109
NSN 5930-01-421-4810
NSN 6220-01-559-6424
NSN 7035-01-653-5450
NSN 6240-01-327-7269