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 5910-00-394-9524
NSN 5895-00-353-6671
NSN 4140-00-653-5245
NSN 5925-01-501-6074
NSN 4140-00-269-5795
NSN 5985-01-417-2139
NSN 5999-00-394-4540
NSN 5945-01-463-8489
NSN 5998-01-176-1608
NSN 6645-00-816-1707
NSN 2925-01-250-2731
NSN 6110-00-187-4537