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 5950-00-239-5261
NSN 5998-00-225-8522
NSN 6130-01-152-1189
NSN 6610-01-398-8815
NSN 5905-01-372-0244
NSN 5985-00-267-9253
NSN 6130-01-571-7700
NSN 5950-01-152-0035
NSN 5835-01-386-4027
NSN 6150-01-398-1138
NSN 6610-01-080-8064
NSN 5855-00-466-2309