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 6220-00-468-0296
NSN 6240-00-235-5159
NSN 6645-01-648-4439
NSN 5905-01-222-0927
NSN 6130-01-262-9437
NSN 5975-00-231-9499
NSN 6620-01-625-2855
NSN 6130-01-093-5804
NSN 6105-00-233-3199
NSN 5985-00-966-6338
NSN 6150-00-842-0873
NSN 5920-01-123-8148