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 5925-01-103-7015
NSN 6240-00-351-5659
NSN 5935-01-241-7913
NSN 7035-00-096-9986
NSN 6135-01-534-0310
NSN 6320-01-219-5174
NSN 5855-00-548-4742
NSN 6685-01-321-3327
NSN 5905-00-400-4670
NSN 5996-00-187-1424
NSN 6145-01-606-9382
NSN 5998-01-125-8894