| Material and corrosion resistance | Confirm the specified material and grade for each component. For stainless steel, distinguish grades such as 304 and 316; for other metals, check the base material and any protective coating. | Material declaration, mill or material test documentation where applicable, and a clearly stated finish specification. | Ensure the approved material and finish are written into the purchase specification and apply to the full production lot. |
| Dimensions and glass fit | Check bracket dimensions, mounting-hole positions, glass thickness range, contact-pad position, and required clearances against the intended shelf and installation method. | Dimensioned technical drawing, tolerance details, and a sample or first-article inspection report. | Approve a controlled drawing before mass production; define how dimensional changes require buyer approval. |
| Load capacity and installation | Review the supplier’s stated load rating together with the test setup, number of brackets, shelf dimensions, wall substrate, fixings, and loading method. Do not treat a rating as universal. | Test report or documented test method, installation instructions, and stated limitations for the rated load. | Confirm that the tested configuration matches the intended use; specify suitable fasteners for the destination installation conditions. |
| Glass-contact protection | Check pad material, dimensions, adhesion or retention, and whether the bracket can contact glass directly during installation or use. | Component specification, sample inspection, and confirmation of pad installation and replacement requirements. | Set acceptance criteria for pad placement and condition; confirm whether spare pads are included or available separately. |
| Finish and appearance | Specify finish type, color, sheen, and acceptable appearance. Inspect for visible scratches, burrs, uneven coating, discoloration, or sharp edges. | Approved reference sample, finish description, and written visual inspection criteria. | Keep a sealed approval sample or documented reference for comparison with pre-shipment samples and future orders. |
| Production quality control | Ask how incoming materials, in-process dimensions, surface finish, assembly, and final packing are checked. Agree on defect definitions and inspection scope. | Quality-control checklist, inspection records, corrective-action process, and pre-shipment inspection results where agreed. | Set inspection timing, sampling method, acceptance criteria, and remedies for nonconforming goods in the order terms. |
| Packaging and shipment protection | Check individual protection, separation of metal parts, quantity per inner and outer carton, carton strength, and protection against moisture and transit abrasion. | Packaging specification, carton dimensions and gross weight, packing photos, and shipping marks for approval. | Confirm that packaging supports the agreed transport route and handling conditions; validate carton data for freight planning. |
| Order terms and delivery planning | Clarify product specifications, order quantity, production lead time, payment milestones, shipment terms, document requirements, and procedures for delays or changes. | Detailed pro forma invoice or purchase contract, confirmed production schedule, and agreed shipping-document checklist. | Use written terms that define responsibilities, inspection arrangements, and the process for handling shortages or defects. |
| Import and compliance documents | Identify destination-market requirements for the product and its intended use. Verify that any claimed test or compliance documentation applies to the exact product and market. | Applicable test reports or declarations, commercial invoice, packing list, and transport documents as required for the shipment. | Check requirements with the relevant authority, customs broker, or qualified adviser before production and shipment. |