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 5950-01-616-3429
NSN 5950-01-520-7906
NSN 2925-00-549-6759
NSN 5985-01-100-3195
NSN 6135-01-359-5798
NSN 6645-01-098-5077
NSN 5960-00-472-5000
NSN 4140-01-497-0033
NSN 6105-01-624-6917
NSN 7035-01-356-4025
NSN 5996-00-196-7258
NSN 5990-01-452-0911