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 6650-01-496-2662
NSN 6105-01-282-4266
NSN 5975-01-282-0477
NSN 5998-00-063-1666
NSN 5925-01-353-0351
NSN 5855-01-605-9627
NSN 6105-00-377-8206
NSN 5905-01-073-7353
NSN 7035-01-127-0147
NSN 5990-01-411-5930
NSN 6685-01-020-8756
NSN 5996-01-444-3364