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 6620-01-572-2493
NSN 5998-00-403-6077
NSN 6145-01-226-7594
NSN 6645-01-632-2272
NSN 6620-00-757-1950
NSN 6650-01-114-8586
NSN 6110-00-721-4042
NSN 5965-00-170-5254
NSN 6150-00-507-2657
NSN 5895-01-100-3472
NSN 2925-00-796-5414
NSN 6220-01-088-6604