Model: 640-21A
Valve SeatProperties:
A replaceable item designed to provide a stationary seating surface for a mating, moveable item such as a valve disk or the like. The body may have a flange of various shapes. For diesel and gasoline reciprocating engines, see insert, engine valve seat.
Part 640-21A NSN 4820-01-464-6335
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: 8481909090
- SITC: 74790
- End Use: Industrial machines, other
- NAICS: 332911
- USDA: 1
Freight Class: Parts of taps, cocks, valves and similar appliances, nesoi
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