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 6135-00-078-9931
NSN 6650-00-891-9850
NSN 5990-00-045-5353
NSN 6150-00-784-0274
NSN 5910-00-498-8876
NSN 5925-00-347-0566
NSN 6145-00-269-4271
NSN 5998-00-355-7986
NSN 6135-01-026-9960
NSN 6320-00-831-2227
NSN 5915-01-011-3406
NSN 6130-01-095-5573