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 5990-00-774-6537
NSN 5930-01-104-8515
NSN 5930-00-516-1217
NSN 5985-01-566-9700
NSN 5920-00-469-2648
NSN 5945-01-380-0117
NSN 6150-01-202-9516
NSN 5950-01-266-0308
NSN 5960-00-401-0794
NSN 5905-00-571-6068
NSN 5895-01-322-5563
NSN 5925-00-369-7747