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 6645-00-539-1705
NSN 5999-01-401-5322
NSN 5985-01-231-3695
NSN 6135-01-335-9184
NSN 6645-01-043-5236
NSN 5935-00-102-3868
NSN 5965-00-431-2492
NSN 5998-01-446-6819
NSN 6620-01-600-0479
NSN 4140-01-026-1381
NSN 6110-00-353-0139
NSN 7035-01-056-5350