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 5910-01-413-9245
NSN 5855-01-452-0157
NSN 6240-01-121-7751
NSN 6610-00-054-7276
NSN 5985-01-463-8198
NSN 5999-01-265-0721
NSN 5895-01-597-7792
NSN 5835-00-967-0998
NSN 6110-00-753-7677
NSN 5998-00-842-6717
NSN 6145-01-395-7260
NSN 6150-00-659-7123