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 4140-01-278-2105
NSN 6610-00-481-7136
NSN 6645-00-948-9763
NSN 5990-01-216-0148
NSN 5945-00-168-7853
NSN 5950-01-024-2835
NSN 6320-01-194-1253
NSN 6145-00-824-5910
NSN 5975-01-634-0678
NSN 6620-01-381-6225
NSN 6645-01-513-4782
NSN 7035-01-495-1090