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 6650-00-788-1461
NSN 6145-01-150-0191
NSN 6610-01-029-7970
NSN 7035-01-141-0013
NSN 5985-00-118-6735
NSN 6135-01-265-1384
NSN 5915-01-266-9149
NSN 6610-01-647-7412
NSN 6685-01-117-8302
NSN 6645-00-295-0625
NSN 5985-01-103-9251
NSN 5975-01-354-0639