When sourcing dining table fittings, you must prioritize load-bearing capacity and material durability. For heavy marble or solid wood tops, ensure the fittings (such as legs or brackets) are rated for at least 1.5 times the weight of the tabletop. Look for materials like 304 stainless steel for corrosion resistance or powder-coated cold-rolled steel for structural strength. If the table is extendable, verify the slide rail mechanism—ball-bearing slides are preferred for a smooth, silent operation and should be tested for at least 50,000 cycles.