Metric Hex Socket Button Head Cap Screws ISO 7380, Stainless Steel A2
Hex drive Socket Cap Screws are often found in applications where there is insufficient wrench/socket clearance for hex head cap screws, or when a "finished" look is desired. Button heads provide a larger bearing surface and a lower head profile than Socket heads, and are used when the material is too thin to countersink. Because of their smaller outer diameter, Socket Head screws may be preferred and are sometimes recessed (counterbored). When clearance is an issue, use a Low Socket Head instead of a Socket Head. Socket Head screws are recommended for high strength applications; Button and Flat heads are suggested when only moderate strength is needed. For Button and Socket heads, measure length from under the head. For Flat heads, length includes head height. See ourMetric Fastener Reference Charts.