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 5990-01-076-8901
NSN 6145-01-321-1989
NSN 5835-01-416-6455
NSN 6610-01-212-9817
NSN 5925-01-198-6220
NSN 6240-01-534-2987
NSN 6685-01-630-2490
NSN 6240-00-829-4179
NSN 5920-01-094-4327
NSN 6240-00-248-4281
NSN 5950-01-035-2514
NSN 5905-01-120-9729