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 5990-00-212-4316
NSN 6110-01-158-5082
NSN 5930-01-480-2333
NSN 6645-00-099-6913
NSN 5895-01-374-2091
NSN 6130-00-596-9565
NSN 5945-01-044-0221
NSN 5855-00-763-2155
NSN 5960-00-501-1602
NSN 5920-00-417-4624
NSN 5930-00-617-7140
NSN 5920-01-375-3164