S-92981A141 M3 ISO 7379 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability & Corrosion Resistance – Black oxide finish provides superior protection against rust and wear in demanding industrial environments.
• High Tensile & Shear Strength – Alloy steel construction with 140,000 psi tensile strength and 84,000 psi minimum shear strength ensures reliable performance under heavy loads.
• Precision Shoulder Fit – 4mm shoulder diameter with tight tolerance (-0.072 to -0.01 mm) allows for accurate alignment and reduces component wear.
• Secure Hex Socket Drive – 2mm hex drive enables high-torque installation without slippage, ideal for confined spaces.
• Coarse Metric Threading – M3x0.5mm coarse pitch with Class 5g6g thread fit ensures quick assembly and vibration resistance.
• Consistent Hardness – Rockwell C32 hardness maintains structural integrity and prevents deformation under stress.
• Global Compliance – Meets ISO 7379 standards and is RoHS 3 & REACH compliant for safe use in regulated industries.

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to address critical alignment and load-bearing challenges in precision assemblies. The alloy steel core, combined with a black oxide finish, resists corrosion and extends service life in machinery, automotive, and electronics applications. The 4mm shoulder diameter and 6mm shoulder length provide a stable pivot or spacer, minimizing misalignment and reducing wear on mating parts. With a hex socket drive, installers achieve secure fastening in tight spaces, while the coarse metric thread (M3x0.5mm) ensures rapid installation and reliable hold in high-vibration settings. Ideal for jigs, fixtures, and rotating mechanisms, this screw delivers consistent performance where precision and strength are non-negotiable.

Specification Summary & Compliance

This shoulder screw adheres to ISO 7379 specifications, with a Class 5g6g thread fit for precise tolerance. The shoulder diameter tolerance is -0.072 to -0.01 mm, and shoulder length tolerance is 0 to 0.25 mm, ensuring exacting dimensional accuracy. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and suitability for global industrial supply chains.