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 6220-00-501-7599
NSN 5925-01-010-2925
NSN 5990-01-383-9780
NSN 5895-01-246-8932
NSN 5930-01-458-0099
NSN 7035-00-541-8516
NSN 5965-00-139-4870
NSN 5920-01-278-9952
NSN 5945-00-109-9794
NSN 5965-01-479-4635
NSN 4140-00-757-5270
NSN 5930-00-492-7996