070M40 Free-Cutting Steel Cold-Formed Key Stock Bar
070M40 (EN8M) sulfur free-cutting steel cold-formed into square key stock bars for shaft keys and couplings, 1/4 x 1/4 inch. Under HTS 7215.10.00 as nonalloy free-cutting bars not further worked than cold-finishing. Precision tolerances for mechanical power transmission.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If lacks free-cutting sulfur/phosphorus
Standard carbon steel bars without machinability elements use 7213.99.
If precision ground to final key dimensions
Finished transmission parts beyond bar stock move to Chapter 84.
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Import Tips & Compliance
• Key stock often sold in sets; declare as individual lengths vs assembled sets
• Verify square dimensions meet bar vs wire rod thickness minimums
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