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 5905-01-622-7674
NSN 5975-01-422-0154
NSN 6135-01-585-8174
NSN 5960-00-138-5109
NSN 6220-00-419-0635
NSN 5930-01-555-4557
NSN 5895-01-547-2544
NSN 5975-01-166-0921
NSN 6240-01-655-7354
NSN 5910-01-240-4035
NSN 5965-01-328-9765
NSN 6645-00-926-4394