Reference manual no. 37013-250
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 5895-01-413-4940
NSN 5985-01-035-3942
NSN 6130-01-069-4632
NSN 6650-00-356-8405
NSN 6685-00-451-6941
NSN 5985-01-123-8667
NSN 5930-01-266-3199
NSN 6135-01-010-0891
NSN 7035-00-238-3662
NSN 6145-01-240-3909
NSN 5985-00-399-5977
NSN 6610-00-798-2900