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 5925-01-433-2946
NSN 6610-01-133-2602
NSN 5855-01-197-2774
NSN 5905-00-120-2668
NSN 5915-01-447-2589
NSN 6130-00-421-2417
NSN 5960-00-481-6677
NSN 6110-01-116-4251
NSN 5915-01-188-8314
NSN 5950-00-130-6568
NSN 6150-01-196-5209
NSN 5960-01-008-5670