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 6220-00-079-0851
NSN 5996-00-648-6580
NSN 5905-01-506-3089
NSN 5950-00-288-0066
NSN 2925-00-010-9609
NSN 5945-01-374-0754
NSN 5998-01-246-5252
NSN 7035-01-537-2644
NSN 6610-01-231-9283
NSN 5985-01-007-8171
NSN 6685-01-398-1097
NSN 6135-01-341-8003