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 5930-00-950-5033
NSN 5935-01-279-5311
NSN 6240-01-459-0902
NSN 5996-01-559-0284
NSN 6685-01-520-4684
NSN 6645-00-983-2046
NSN 6105-01-181-1765
NSN 6650-00-809-1817
NSN 5895-01-656-4721
NSN 5855-01-495-1038
NSN 5960-00-376-5514
NSN 6145-01-474-3924