S-92981A941 M1.6 ASTM A108 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability: Crafted from alloy steel with Rockwell C32 hardness for superior resistance to wear and deformation in demanding applications.
• Corrosion Resistance: Black oxide finish provides a protective layer, extending service life in various industrial environments.
• Precision Fit & Assembly: Class 5g6g thread fit ensures consistent, reliable engagement and reduces the risk of cross-threading during installation.
• Secure Fastening & Stability: The integrated 4mm shoulder length acts as a precise locating surface, maintaining alignment and absorbing shear forces.
• Efficient Installation: 1.5mm hex drive socket head allows for high-torque application with standard tools, speeding up assembly processes.
• Optimized for Coarse Thread Applications: M1.6 x 0.35mm coarse pitch thread facilitates quicker installation and is less prone to clogging in challenging materials.
• Regulatory Compliance & Safety: Meets ASTM A108 specifications and is RoHS 3 & REACH compliant, ensuring environmental safety and material reliability.

Professional Applications & Engineering Value

This M1.6 shoulder screw is engineered to address critical assembly challenges in precision industries such as electronics, small machinery, and optical devices. The alloy steel construction, hardened to Rockwell C32, provides the necessary strength to withstand vibrational stresses and repeated adjustments without stripping. The black oxide finish not only enhances corrosion resistance but also reduces galling, making it ideal for use in environments exposed to moisture or chemicals. The socket head with a 1.5mm hex drive ensures a secure grip for high-torque installations in confined spaces, while the 4mm shoulder length offers precise axial positioning, preventing component misalignment and reducing wear on mating parts. By integrating a Class 5g6g thread fit and coarse pitch metric thread, this screw delivers reliable performance in applications requiring quick disassembly and reassembly, such as jigs, fixtures, and small robotic assemblies.

Specification Summary & Compliance

This precision shoulder screw features a 2mm shoulder diameter with a tolerance of -0.072 to -0.01 mm and a 4mm shoulder length with a tolerance of 0 to 0.25 mm, ensuring exact dimensional accuracy for secure fits. The metric thread adheres to Class 5g6g fit standards, providing consistent thread engagement. It is manufactured in compliance with ASTM A108 for material consistency and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally conscious and regulated industries.