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 7035-00-275-5604
NSN 5960-01-512-0233
NSN 6135-00-009-4100
NSN 5945-01-186-3409
NSN 4140-00-525-9214
NSN 5999-01-360-4742
NSN 6320-01-015-9856
NSN 6105-01-200-8011
NSN 5975-01-246-5308
NSN 2925-01-583-5619
NSN 5855-00-951-6483
NSN 6105-00-773-8480