Model: 30H21
Expansion PlugSpecial Features:
Rockwell hardness b-50 min, b-80 max; can also be supplied with edge cut, as in style b7
Properties:
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.
Part 30H21 NSN 5340-01-197-3177
Material Classification
Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicatorsPackaging & Shipping
Freight Classification
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Schedule B and Export
- Schedule B: 8402900090
- SITC: 71191
- End Use: Industrial machines, other
- NAICS: 332410
- USDA: 1
Freight Class: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
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