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 6145-01-296-5580
NSN 5965-00-588-4885
NSN 6320-01-152-8873
NSN 6130-01-246-0737
NSN 5975-00-507-4007
NSN 5996-01-152-7396
NSN 6650-01-334-6856
NSN 5915-01-277-2613
NSN 6220-01-090-0126
NSN 5990-01-411-5930
NSN 5985-01-463-8562
NSN 6150-01-356-8996