S-92981A942 M1.6 ASTM A108 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability & Corrosion Resistance: Black oxide finish provides superior protection against rust and wear in harsh industrial environments, extending service life.
• High-Strength Alloy Steel Construction: Offers excellent load-bearing capacity and resistance to deformation, ensuring reliable performance under stress.
• Precision Thread Fit (Class 5g6g): Guarantees consistent, secure fastening with minimal play, reducing the risk of loosening in vibrating applications.
• Optimized for High-Torque Applications: The 1.5 mm hex socket drive allows for efficient installation with standard tools, minimizing stripping and improving assembly speed.
• Rockwell C32 Hardness: Provides a robust balance of toughness and machinability, resisting wear and maintaining thread integrity over repeated use.
• Strict Dimensional Tolerances: Shoulder diameter and length are precisely controlled for accurate alignment and fit in precision assemblies.
• Compliance with Global Standards: Meets ASTM A108, RoHS 3, and REACH regulations, ensuring safety and environmental responsibility for international supply chains.

Professional Applications & Engineering Value

This M1.6 shoulder screw is engineered to address critical alignment and spacing challenges in compact, high-precision assemblies. The alloy steel core, hardened to Rockwell C32, ensures it withstands cyclic loads without failure, making it ideal for applications in electronics, miniature mechanisms, and automated equipment where vibration resistance is paramount. The black oxide finish not only enhances corrosion protection but also reduces galling during installation. With its Class 5g6g thread fit and controlled shoulder dimensions, it provides exact positioning for rotating parts like bearings or pulleys, minimizing misalignment and wear. This socket head shoulder screw is a reliable solution for industries requiring metric precision and long-term durability in confined spaces.

Specification Summary & Compliance

This shoulder screw features a metric thread (M1.6x0.35mm) with a Class 5g6g thread fit for precise engagement. Dimensional tolerances include a shoulder diameter of 2 mm (tolerance: -0.072 to -0.01 mm) and shoulder length of 5 mm (tolerance: 0 to 0.25 mm). It is manufactured in compliance with ASTM A108 standards and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring adherence to environmental and safety regulations.