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 6130-01-206-4032
NSN 5855-01-152-0506
NSN 5985-01-366-4276
NSN 5975-01-441-3156
NSN 5895-01-206-4619
NSN 6610-01-078-9238
NSN 5855-01-191-3404
NSN 5895-00-395-1457
NSN 5950-01-052-6655
NSN 6105-00-998-6340
NSN 5999-01-304-8176
NSN 6320-01-516-3836