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 6135-01-448-4680
NSN 6110-01-299-8870
NSN 6220-01-504-6494
NSN 6145-01-607-6165
NSN 5965-00-912-9318
NSN 6105-01-063-4909
NSN 6645-00-498-6869
NSN 5965-01-185-2026
NSN 6685-01-493-8277
NSN 5975-00-225-5293
NSN 2925-01-076-6128
NSN 6135-01-348-4056