Top Pick 5/8-11 X 3-1/2″ Socket Cap Screws Hex Socket Drive Alloy Steel Thermal Black Oxide (25 / Pkg.)

Engineered for reliability in demanding assemblies, the Socket Head Cap Screw features high-strength alloy steel and a thermal black oxide finish. Sized at 5/8-11 UNC with a length of 3-1/2 inches, this fastener delivers dependable performance in machinery, automotive, and industrial applications while maintaining a clean, professional appearance.

Key Features

High-strength alloy steel construction for dependable load-bearing performance

Thermal black oxide finish provides wear resistance and a low-glare surface

Hex socket drive for precise tightening and reduced cam-out

Size: 5/8-11 UNC thread, Length: 3-1/2 in

Compact cylindrical head design suitable for a range of assemblies

Specifications

Product Type: Socket Head Cap Screw

Material: Alloy steel

Finish: Thermal black oxide

Size / Thread: 5/8-11 UNC

Length: 3-1/2 in (approx. 89 mm)

Drive Type: Hex socket

Applications

Ideal for automotive, machinery, and equipment assemblies where strong, reliable fasteners with a clean, professional finish are required.

Why Choose This Fastener

Combining high-strength alloy steel with a durable thermal black oxide coating, this socket head cap screw delivers consistent performance under demanding conditions, while its hex drive ensures secure tightening and a smooth installation experience for both professionals and DIY enthusiasts.