Value Collection 537158PR Shoulder Screw M8x1.25 Alloy Steel

Product Description

The VALUE COLLECTION 537158PR is a metric shoulder screw machined from grade 8 alloy steel, designed to serve as a precise pivot point, spacer, or guide in mechanical assemblies. The shoulder measures 10 millimeters in diameter and 45 millimeters in length, providing a smooth, hardened bearing surface between mating components. Drive engagement is via a hex socket recess. The M8x1.25 threaded section pulls the shoulder firmly against the mating part while the unthreaded shoulder bears the load. This fastener is used by machinists, maintenance technicians, and mechanical assembly professionals across industrial and trade applications.

Shoulder screws of this type appear in jigs and fixtures, linkage assemblies, cam mechanisms, conveyor components, and precision machine tooling where a controlled-diameter pin with a threaded retention end is required. The grade 8 alloy steel construction suits moderate-to-high load applications. The M8x1.25 metric thread standard is widely used in European and metric-spec equipment, making this screw a direct fit for machinery requiring metric fasteners in that thread class.

Key Features

• 10 millimeter shoulder diameter provides a precise, smooth bearing surface
• 45 millimeter shoulder length suits deep linkage and pivot applications
• M8x1.25 metric thread for secure retention in metric-tapped holes
• Grade 8 alloy steel construction for high tensile strength
• Hex socket drive for torque application in confined spaces
• Metric thread standard compatible with metric-spec assemblies

Compatibility

Designed as a standard metric shoulder screw for use in mechanical assemblies, jigs, fixtures, and equipment requiring an M8x1.25 threaded retention with a 10 millimeter diameter shoulder.

Installation Notes

Installation is performed by mechanical technicians or machinists using an appropriately sized hex key or Allen driver. Ensure the mating tapped hole is clean and thread-chased before installation. Do not use pneumatic impact tools on shoulder screws, as overtorque can damage the shoulder-to-face seating surface. Follow the equipment manufacturer's torque specifications for M8 fasteners when applicable.