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 2925-01-512-4682
NSN 6685-01-217-7870
NSN 5915-00-732-9228
NSN 5998-01-596-3081
NSN 5996-00-281-4500
NSN 6685-00-767-5577
NSN 5975-01-023-6897
NSN 6220-01-506-6066
NSN 6685-01-089-9606
NSN 5910-01-422-1110
NSN 6130-01-085-3085
NSN 5910-01-429-8785