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 6135-00-519-1325
NSN 5985-01-553-7912
NSN 6240-00-251-5235
NSN 5990-00-883-6364
NSN 6645-00-246-4934
NSN 6320-01-426-8947
NSN 6645-01-512-2034
NSN 6685-01-167-4298
NSN 5835-01-320-8306
NSN 5905-01-168-4649
NSN 5920-01-274-8565
NSN 6685-00-814-5704