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 5925-01-431-8088
NSN 6320-00-908-6841
NSN 5925-01-544-6846
NSN 2925-01-565-6410
NSN 5905-01-299-5572
NSN 5915-01-142-0053
NSN 6240-01-210-8467
NSN 6650-00-197-7563
NSN 6610-01-352-5500
NSN 5945-01-494-1428
NSN 5996-01-213-5184
NSN 6145-00-849-7691