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 6105-01-028-4626
NSN 4140-01-160-1742
NSN 5996-00-305-6152
NSN 5999-00-958-5126
NSN 4140-00-477-1863
NSN 6240-01-514-7114
NSN 6110-00-232-5110
NSN 5965-01-482-0235
NSN 5950-00-280-2560
NSN 4140-01-264-9593
NSN 7035-00-541-8516
NSN 5835-01-156-5622