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 6650-00-067-3572
NSN 6685-01-441-2198
NSN 7035-01-582-1251
NSN 6645-01-222-5468
NSN 5930-01-536-9935
NSN 5930-00-227-7345
NSN 5910-01-463-7330
NSN 5935-00-107-0154
NSN 4140-00-619-8062
NSN 5975-01-529-7331
NSN 7035-01-123-8723
NSN 6685-00-196-5592