5/8-18 x 1 Alloy Steel Flat Head Socket Cap Screw helps solve clearance and snag-point issues on panels, guards, and fixture plates that require a flat installed face. The flat-head profile is particularly useful around moving stock, operator contact areas, and assemblies where exposed screw heads should not project.

Engineers specify this style for automation equipment, robotic tooling, conveyor systems, and packaging machinery that benefit from reduced head projection. As an alloy steel socket fastener, it is selected for industrial assemblies that require a durable internal-hex screw where 82-degree countersunk geometry and socket-drive access are important. The internal hex drive supports top-side socket engagement where side access is limited.

For this 5/8-18 thread and 1 in. length, the verified head data helps engineers compare countersink depth, head clearance, and tooling access. Cold Headers has supplied specialty socket fasteners since 1962, including flat head sizes used in machine building and repair operations.

Technical Highlights

• Material: Alloy Steel
• Thread Size: 5/8-18
• Length: 1 in.
• Nominal Body Diameter (B): 0.625 in.
• Head Diameter (A): 1.112-1.188 in.
• Head Height: 0.324 in.
• Hex Socket Size (J): 3/8 in.
• Minimum Key Engagement (T): 0.220 in.
• Drive Type: Internal Hex

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.