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 5945-00-720-2923
NSN 6150-00-499-5729
NSN 5905-00-513-6077
NSN 5990-01-074-6549
NSN 5960-00-880-9589
NSN 6645-00-909-2143
NSN 5965-01-385-4235
NSN 5930-00-292-1089
NSN 6135-01-604-8739
NSN 5895-01-268-4440
NSN 6135-00-635-9187
NSN 5920-01-316-7419