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 6130-01-059-7097
NSN 6685-01-209-4683
NSN 5930-00-759-6653
NSN 5985-01-113-7113
NSN 6135-01-025-8109
NSN 5975-00-647-4968
NSN 6150-00-201-8303
NSN 5998-01-553-4957
NSN 5935-01-159-9563
NSN 5855-01-501-5176
NSN 5985-00-978-5039
NSN 6620-00-104-6937