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 5960-00-665-5180
NSN 7035-01-413-6697
NSN 5920-01-168-3232
NSN 5975-00-915-7632
NSN 5950-00-413-1271
NSN 5945-01-512-0284
NSN 6320-01-607-1491
NSN 2925-01-224-1884
NSN 5925-00-936-5791
NSN 5999-00-310-4766
NSN 5915-01-502-7550
NSN 5960-00-258-9292