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 6220-00-760-5780
NSN 6145-00-351-4539
NSN 5925-01-461-9298
NSN 5999-00-512-6398
NSN 6110-00-412-5516
NSN 5975-00-558-2495
NSN 5965-01-286-6548
NSN 5965-00-009-8679
NSN 5996-01-245-6121
NSN 5925-01-131-7724
NSN 5960-01-323-6432
NSN 5950-01-286-5170