Value Collection 225166BR Shoulder Screw 5/8 in 1-3/4 in 4140 Steel

Product Description

The VALUE COLLECTION 225166BR is a hex socket shoulder screw machined from 4140 alloy steel, designed for precision-fit applications where a hardened, ground shoulder acts as a bearing surface, pivot, or spacer. The shoulder measures 5/8 inch in diameter and 1-3/4 inches in length, with a 1/2-13 UNC threaded end to draw the fastener firmly into a tapped bore. The hex socket drive accepts a 5/16-inch hex key. This fastener meets ASME/ANSI B18.3, ASTM F835, and IFI 124 standards, making it suitable for demanding mechanical assemblies where dimensional accuracy and material strength are critical. Machinists, millwrights, and maintenance technicians typically install this type of fastener.

Shoulder screws in this configuration are used in jigs and fixtures, die sets, linkage assemblies, and equipment where a precise rotating or sliding fit between the shoulder and a mating bore is required. The 4140 alloy steel construction provides high tensile strength and wear resistance, appropriate for industrial machinery, conveyor systems, and fabrication tooling. The 1/2-13 UNC thread is a standard coarse-thread size, compatible with commonly available tapped holes and nuts in North American manufacturing environments.

Key Features

• 5/8-inch shoulder diameter provides a precision bearing or pivot surface in close-tolerance bores
• 1-3/4-inch shoulder length suits moderate-depth assemblies requiring a defined stand-off or travel distance
• 4140 alloy steel construction delivers high strength and hardness for demanding mechanical applications
• 1/2-13 UNC threaded end is a widely available coarse-thread standard for straightforward installation
• 5/16-inch hex socket drive allows torque application in confined spaces with a standard hex key
• Meets ASME/ANSI B18.3, ASTM F835, and IFI 124 dimensional and mechanical standards

Compatibility

Designed as a standard-dimension shoulder screw per ASME/ANSI B18.3 for use in any application requiring a 5/8-inch shoulder diameter, 1-3/4-inch shoulder length, and 1/2-13 UNC threaded engagement in alloy steel construction.

Installation Notes

Installation is typically performed by machinists or maintenance technicians using a 5/16-inch hex key or T-handle driver. Ensure the mating bore is sized to the shoulder diameter tolerance specified by ASME/ANSI B18.3 for the intended fit class before installation. Do not over-torque the threaded end into blind holes without confirming sufficient thread engagement depth. Verify that the shoulder length is appropriate for the stack thickness of the assembly before final assembly.