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 5910-01-451-4292
NSN 5996-01-316-4275
NSN 6320-00-456-0836
NSN 6645-00-456-7653
NSN 5835-01-619-6268
NSN 6110-00-383-5367
NSN 5999-01-386-5327
NSN 5950-00-276-8584
NSN 5855-00-925-0114
NSN 5895-01-519-7931
NSN 5985-00-274-2851
NSN 5985-01-123-8296