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 5998-01-254-6725
NSN 5998-00-911-8394
NSN 5910-01-644-1562
NSN 5835-01-447-2544
NSN 6610-01-197-9639
NSN 5990-01-492-1114
NSN 6150-00-134-1080
NSN 5895-00-548-9329
NSN 5960-00-195-4448
NSN 5945-01-132-6974
NSN 5960-01-425-1454
NSN 5985-01-571-7760