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 5920-01-249-7365
NSN 5999-01-146-5436
NSN 7035-01-106-3476
NSN 6145-00-679-6470
NSN 5950-00-458-1829
NSN 6645-00-372-2618
NSN 6220-00-527-1177
NSN 5855-01-267-2751
NSN 5950-01-535-0099
NSN 6240-01-045-7755
NSN 6620-00-193-9503
NSN 6320-01-631-7828