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 6240-01-210-2715
NSN 6645-00-527-7258
NSN 5965-01-295-1125
NSN 5855-00-179-8588
NSN 5895-01-597-8453
NSN 5999-01-401-5322
NSN 6320-01-570-8814
NSN 7035-01-211-5636
NSN 5930-00-732-2509
NSN 5998-01-233-6751
NSN 5950-01-498-3129
NSN 5905-01-220-7215