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 5925-01-449-2777
NSN 6240-01-014-3447
NSN 6650-01-607-5817
NSN 5990-01-120-1910
NSN 7035-01-045-7202
NSN 6610-01-307-3192
NSN 6130-01-426-8841
NSN 5985-01-316-4591
NSN 5990-01-054-3332
NSN 5985-01-147-7872
NSN 5895-01-446-3420
NSN 4140-00-269-5795