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 5930-01-009-4770
NSN 5930-01-104-4492
NSN 6650-00-536-5564
NSN 6610-01-167-1771
NSN 6220-01-371-3430
NSN 6610-01-426-5090
NSN 6150-01-107-3455
NSN 6110-00-099-7113
NSN 5855-00-014-5008
NSN 5905-00-520-8805
NSN 5960-01-614-8005
NSN 7035-01-411-6062