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 5965-01-500-2468
NSN 6135-01-131-9352
NSN 5950-00-826-9034
NSN 6110-00-221-1868
NSN 6135-01-426-0671
NSN 5990-01-056-6413
NSN 6145-01-327-7079
NSN 5999-00-201-4023
NSN 5950-01-549-1457
NSN 5895-01-137-0753
NSN 5905-01-364-0737
NSN 6220-01-436-3850