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 5905-01-429-0372
NSN 6130-01-227-5538
NSN 6650-01-439-4639
NSN 6620-01-604-4072
NSN 6620-01-529-7513
NSN 5999-00-912-1747
NSN 6645-01-473-9179
NSN 5960-01-234-9107
NSN 6110-01-111-2614
NSN 6135-01-252-0315
NSN 5950-00-957-7144
NSN 5945-00-080-7731