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 6610-01-420-3780
NSN 6645-01-101-2877
NSN 5996-00-514-2882
NSN 5855-01-203-4719
NSN 5925-01-572-4516
NSN 5990-01-056-6413
NSN 6320-01-277-5793
NSN 6240-01-266-7442
NSN 6610-00-186-9180
NSN 6220-01-082-7766
NSN 5960-01-383-6262
NSN 6150-01-142-3406