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 6610-01-240-9690
NSN 5950-00-909-6717
NSN 6685-01-391-6790
NSN 5905-00-244-1562
NSN 6320-00-070-4544
NSN 5935-00-503-2695
NSN 5920-01-119-3652
NSN 6620-01-122-0238
NSN 5965-01-413-4424
NSN 5990-01-056-6413
NSN 5985-01-375-3981
NSN 5930-00-849-5322