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 5975-01-027-2157
NSN 5996-00-272-2560
NSN 5985-01-388-1273
NSN 6135-01-625-0765
NSN 5905-00-233-9392
NSN 6130-01-454-5623
NSN 5920-01-032-5002
NSN 5990-01-386-3040
NSN 6620-01-659-1256
NSN 7035-00-059-7970
NSN 5985-00-267-1037
NSN 6110-01-166-3323