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 6620-01-249-8383
NSN 5965-01-534-2818
NSN 7035-00-270-5519
NSN 5985-01-071-5475
NSN 6610-01-249-3243
NSN 5920-01-076-7045
NSN 5920-01-047-9711
NSN 6150-01-425-5635
NSN 5985-00-253-4708
NSN 6240-01-381-5541
NSN 5985-01-473-5077
NSN 6610-01-337-4640