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 5985-01-050-8231
NSN 6240-01-032-4624
NSN 5905-01-414-5824
NSN 5950-00-983-0807
NSN 2925-01-384-4139
NSN 5945-00-130-2618
NSN 5855-00-688-9954
NSN 6130-00-112-9510
NSN 6130-01-244-7410
NSN 6220-00-967-0062
NSN 5925-00-179-0094
NSN 5835-01-143-6841