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 6130-01-231-9245
NSN 5905-01-275-7982
NSN 6645-00-300-6459
NSN 6135-00-100-8890
NSN 6105-01-298-8320
NSN 7035-00-225-1961
NSN 5996-01-147-6054
NSN 5965-00-592-0812
NSN 5905-01-018-7884
NSN 6240-00-055-0209
NSN 5925-00-330-8778
NSN 5975-01-316-4983