Value Collection 221226BR Shoulder Screw 3/4 in Alloy Steel

Product Description

The VALUE COLLECTION 221226BR is a hex socket shoulder screw machined from grade 8 alloy steel with an uncoated finish. The shoulder measures 0.750 inches in diameter and 2-1/2 inches in length, providing a precise bearing surface for pivoting or sliding components. The threaded section carries a 5/8-11 UNC thread, and the fastener is driven by a 3/8 inch hex socket drive. At 0.468 pounds, this is a solid, heavy-duty fastener suited to mechanical assemblies requiring tight dimensional tolerances on the shoulder. Machinists, millwrights, and maintenance technicians working on jigs, fixtures, linkages, and motion-control assemblies reach for this type of fastener regularly.

Shoulder screws of this size are commonly used in industrial and commercial machinery where a smooth, precisely dimensioned shaft is needed to act as a pivot pin, guide post, or spacer. The 3/4 inch shoulder diameter and 2-1/2 inch shoulder length make this fastener appropriate for moderate-to-heavy-duty linkage assemblies, die sets, and fixture components. The grade 8 alloy steel construction handles high shear and tensile loads. This screw is suitable for applications where the shoulder itself carries the load rather than the threaded portion.

Key Features

• Shoulder diameter of 0.750 inches provides a precision bearing and pivot surface
• 2-1/2 inch shoulder length accommodates thicker component stacks in linkage and fixture assemblies
• Grade 8 alloy steel construction for high shear strength and tensile load capacity
• 5/8-11 UNC thread for engagement with standard inch-series tapped holes
• 3/8 inch hex socket drive for positive torque transfer with a standard hex key or socket driver
• Uncoated finish; suitable for use as-is or with customer-applied coating where corrosion protection is needed

Compatibility

Designed as an OEM-style or replacement shoulder screw for mechanical assemblies requiring a 3/4 inch shoulder diameter, 2-1/2 inch shoulder length, and 5/8-11 UNC thread. Conforms to ANSI B18.3 and ASME/ANSI B18.3 dimensional standards and meets ASTM A574 material requirements.

Installation Notes

Installation is performed by millwrights, machinists, or maintenance technicians using a 3/8 inch hex key or socket driver. The mating tapped hole must be sized for 5/8-11 UNC thread; verify thread engagement depth before final installation. Do not use the threaded section as the bearing surface — the shoulder must seat fully against the mating bore. Follow facility-specific torque procedures and applicable ASME fastener standards when determining final installation torque.