Value Collection 537148PS Shoulder Screw M8x1.25 Alloy Steel

Product Description

The VALUE COLLECTION 537148PS is an alloy steel shoulder screw designed for precise mechanical assemblies requiring a hardened, accurately dimensioned shoulder as a pivot point, spacer, or guide pin. The screw features a 10 mm shoulder diameter and a 20 mm shoulder length, with an M8x1.25 metric thread for secure fastening. Manufactured to material grade 12.9, it delivers high tensile strength suitable for demanding industrial and mechanical applications. Drive engagement is through a hex socket recess, allowing installation with a standard hex key or Allen driver. The uncoated finish is as-machined alloy steel.

This shoulder screw is used in precision machinery, jigs, fixtures, tooling, and mechanical linkages where a controlled-diameter shank is needed to guide movement or provide a bearing surface. The 20 mm shoulder length and 10 mm shoulder diameter suit medium-duty assemblies in manufacturing, automation, and general industrial maintenance environments. It is typically installed by machinists, maintenance technicians, or mechanical assemblers working with metric fastener specifications.

Key Features

• Grade 12.9 alloy steel construction for high tensile and shear strength
• 10 mm shoulder diameter with 20 mm shoulder length for precise fitment
• M8x1.25 metric thread for standard metric assembly
• Hex socket drive for torque application in confined spaces
• Uncoated finish — no coating buildup affecting shoulder tolerance
• Meets ASME/ANSI B18.3.3.M, BS 4168, and ISO 7379 standards

Compatibility

Designed as a metric shoulder screw replacement or new-installation fastener for precision mechanical assemblies requiring a 10 mm shoulder diameter and M8x1.25 thread specification per ASME/ANSI B18.3.3.M, BS 4168, and ISO 7379.

Installation Notes

Install using a calibrated hex key or socket driver sized to the hex socket recess; do not use impact drivers on grade 12.9 shoulder screws unless specifically engineered for that application. Ensure the mating bore is reamed or tolerance-matched to the 10 mm shoulder diameter for proper shoulder fit. Verify thread engagement depth in the receiving component meets minimum requirements per applicable fastener standards before torquing. Minimum order quantity for this part number is 5 pieces.