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 5999-01-378-7129
NSN 5920-01-336-1730
NSN 6685-01-168-8893
NSN 5985-01-231-5752
NSN 5945-00-240-7869
NSN 6220-00-044-3553
NSN 6645-01-144-6415
NSN 6685-01-630-2177
NSN 6135-01-354-5535
NSN 6220-01-357-6872
NSN 6650-01-261-1217
NSN 7035-01-227-2546