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 2925-01-197-7864
NSN 5920-01-353-0089
NSN 5930-00-445-5423
NSN 7035-00-177-1557
NSN 6650-01-495-1269
NSN 5925-00-282-2459
NSN 5905-01-641-5334
NSN 6240-01-106-0793
NSN 5910-00-239-4587
NSN 5935-00-928-3825
NSN 6105-00-547-2752
NSN 5910-00-152-4145