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 5996-01-398-0037
NSN 5998-00-082-3396
NSN 6685-01-171-5120
NSN 6645-00-166-7926
NSN 5905-00-024-0985
NSN 5998-00-079-1375
NSN 5945-01-021-9299
NSN 5996-00-009-6113
NSN 5999-00-155-3088
NSN 6645-00-814-4558
NSN 6620-00-262-3113
NSN 5996-01-545-6579