5/8-18 x 1 1/2 Alloy Steel Flat Head Socket Cap Screw is intended for applications where a smooth exposed surface and socket-drive installation are both important. The internal hex drive allows installation from above the workpiece, which is helpful in compact equipment where external wrench clearance is limited.

The geometry works well in precision assemblies, panel hardware, inspection covers, and automation cells where clearance around the screw head is limited. Alloy steel construction is appropriate for mechanical fastening applications where the drawing or bill of materials calls for an alloy socket screw. The internal hex drive supports top-side socket engagement where side access is limited.

For this 5/8-18 thread and 1 1/2 in. length, the verified head data helps engineers compare countersink depth, head clearance, and tooling access. Cold Headers helps buyers match thread, length, and head style when replacement hardware must align with existing countersunk components.

Technical Highlights

• Material: Alloy Steel
• Thread Size: 5/8-18
• Length: 1 1/2 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.