Value Collection 537160PR Shoulder Screw M8x1.25 Alloy Steel

Product Description

The VALUE COLLECTION 537160PR is a metric shoulder screw engineered for precision fastening applications where a hardened, close-tolerance shoulder is required to act as a bearing surface, pivot point, or linear guide. The screw features a 10 mm shoulder diameter and a 50 mm shoulder length, paired with an M8x1.25 threaded end. Manufactured from alloy steel at material grade 12.9, it delivers high tensile and yield strength suitable for demanding mechanical assemblies. Drive engagement is via a hex socket, compatible with standard Allen or hex key tooling. The finish is uncoated, preserving the base material properties.

This shoulder screw is used in mechanical, industrial, and light fabrication applications requiring a precise pivot or guide shaft integrated into a bolted connection. Typical installations include jigs and fixtures, die sets, linkage assemblies, and machinery components where a smooth cylindrical shoulder must bear lateral load or serve as a locating element. It is sized per metric standards and suited for both OEM assembly and field maintenance work performed by machinists, millwrights, and maintenance technicians.

Key Features

• 10 mm shoulder diameter with 50 mm shoulder length for precise fit in close-tolerance bored holes
• M8x1.25 metric thread end for secure threaded engagement
• Grade 12.9 alloy steel construction provides high tensile strength
• Hex socket drive compatible with standard metric Allen key tooling
• Uncoated finish suitable for further treatment or use as-is in dry or lubricated environments
• Compliant with ASME/ANSI B18.3.3.M, BS 4168, and ISO 7379 standards

Compatibility

Designed as a standard metric shoulder screw per ASME/ANSI B18.3.3.M, BS 4168, and ISO 7379, making it interchangeable in any application calling out those dimensional standards with a 10 mm shoulder diameter and M8x1.25 thread.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a hex key or Allen driver sized to the socket recess. Ensure the receiving bore is within the specified tolerance for the 10 mm shoulder before installation. Do not use impact drivers on hex socket shoulder screws, as this can damage the socket recess or over-torque the threaded section. De-energize and lock out any machine or assembly before servicing fasteners in moving or loaded assemblies.