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 5985-01-090-0098
NSN 6620-01-372-4168
NSN 6135-01-345-6157
NSN 5975-00-153-7971
NSN 5975-01-378-8059
NSN 5998-01-609-5638
NSN 6130-00-228-5636
NSN 5930-00-280-7777
NSN 5999-00-864-3438
NSN 5905-00-080-5265
NSN 6610-01-025-4718
NSN 5895-01-337-4077