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 5960-00-024-0633
NSN 5855-01-463-9401
NSN 5835-00-794-7500
NSN 6320-01-476-7702
NSN 6240-01-391-0399
NSN 6240-01-003-8666
NSN 6645-00-238-6170
NSN 6610-01-271-7593
NSN 5950-00-837-5819
NSN 6240-01-131-3223
NSN 6650-00-389-4111
NSN 5950-01-016-4734