Socket head cap screws have cup points that produce a thin edge that digs into hard surfaces for a secure hold. Rounded head has splined outer circumference with internal hex drive. Use an Allen wrench (hex key) to secure with required torque as needed. Length is measured from underneath the head to the base of the cup point.
Prime-Line #10-24 x 1 in. Grade 18-8 Stainless Steel Hex (Allen) Drive Socket Head Cap Screws (10-Pack)
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Stainless Steel Socket Head Cap Screw and SHCS Hex Screws manufacturer