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 2925-01-061-4012
NSN 5945-01-541-7628
NSN 5920-01-062-2209
NSN 5915-00-156-7877
NSN 5960-01-426-3456
NSN 5950-01-254-2699
NSN 6220-01-386-3082
NSN 6610-01-435-8982
NSN 5990-01-216-1276
NSN 5996-01-150-2800
NSN 5925-01-487-6229
NSN 6685-00-398-0341