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 6650-01-233-1065
NSN 5990-00-881-6624
NSN 2925-01-633-4048
NSN 5996-01-608-4360
NSN 6110-01-316-8638
NSN 5935-00-197-9463
NSN 5950-01-573-9203
NSN 6685-01-267-6862
NSN 6320-00-882-7061
NSN 6645-01-512-8472
NSN 6610-01-247-6374
NSN 4140-01-367-3108