Which system details must accompany a rubber bumper plates request
The shortest request a supplier can still quote from names form (rectangular block, D-profile, cylindrical, stud-mounted or drawing-based), thickness or projection, width and footprint, Shore A hardness, mounting method, quantity and US destination. “Plate” without those axes is a search string, not a line item. Rubber Bumper Sourcing copies that list to more than one factory.
Which width and footprint information decides whether an offer is usable
Width and footprint change hole spacing, plate mass and sometimes the quoted mold. Leave them blank and two factories will silently pick different catalogue faces. This step is one-off per configuration; repeating it on every carton is not required once the factory writes the value back. A supplier-proposed alternative is usable only when the changed width, projection and Shore A are written on the same line.
Separate quantity-driven items from one-off checks
Quantity, packing (carton versus pallet) and Incoterms scale with the lot. Sample approval, a named ASTM method and automotive files are one-off until the configuration changes. Mixing the two groups makes unit prices look comparable when they are not.
How a supplier-proposed alternative should be evaluated
We lay specification, documents, packing and delivery window side by side. We do not recast a unit cell as a market-beating percentage. A plant certificate does not stand in for a lot test on the quoted rubber bumper plates construction. If the factory swaps vulcanized rubber for TPE / TPU, treat that as a new request: compression set and tear strength will not travel with the original line.