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 5960-00-981-2004
NSN 6240-00-115-2251
NSN 6105-00-869-0624
NSN 5855-00-688-9954
NSN 5965-01-029-5222
NSN 6240-00-306-9214
NSN 6110-01-025-9773
NSN 6685-00-717-4058
NSN 5930-01-465-7135
NSN 6130-01-410-9195
NSN 5996-00-212-8004
NSN 6135-01-329-7994