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 6320-01-519-8767
NSN 5960-01-489-1510
NSN 5950-01-440-6360
NSN 5920-00-433-6596
NSN 6145-01-254-4080
NSN 6240-01-551-1722
NSN 6240-00-351-5659
NSN 5990-01-186-6446
NSN 6685-01-085-5977
NSN 4140-01-100-1223
NSN 5910-01-339-7770
NSN 4140-01-067-4317