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 5920-00-959-9548
NSN 5999-00-326-2279
NSN 6240-00-342-9756
NSN 5920-00-829-3634
NSN 7035-01-541-5414
NSN 7035-00-104-5506
NSN 5985-00-983-6776
NSN 6620-00-273-8735
NSN 5965-01-369-7860
NSN 6650-01-386-5787
NSN 6645-00-690-0423
NSN 5905-01-025-9045