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 6610-00-712-2217
NSN 5855-00-411-8688
NSN 6685-00-149-1600
NSN 2925-00-862-8550
NSN 6130-01-647-0903
NSN 7035-00-803-3056
NSN 5855-01-190-5564
NSN 6685-01-196-9575
NSN 5965-01-447-3767
NSN 5975-00-598-0159
NSN 6240-00-863-6105
NSN 7035-01-566-8130