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 2925-01-459-8093
NSN 5905-01-607-7517
NSN 5990-01-234-8646
NSN 6645-00-224-8632
NSN 6150-01-510-9343
NSN 5996-01-398-8197
NSN 5945-00-279-3223
NSN 6650-01-523-0888
NSN 5895-00-637-2658
NSN 5996-01-633-6642
NSN 5920-00-076-9889
NSN 6620-01-032-3937