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 6685-01-218-5258
NSN 2925-01-370-6898
NSN 6135-01-136-8306
NSN 6150-00-891-7922
NSN 6105-00-489-9140
NSN 6110-00-018-9112
NSN 6110-01-318-1458
NSN 6645-01-470-7246
NSN 6110-01-512-8018
NSN 5930-01-250-6098
NSN 5910-01-061-1450
NSN 6145-00-923-8127