S-92981A951 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 Construction: Made from alloy steel with Rockwell C32 hardness, ensuring reliable performance under mechanical stress and vibration.
• Precision Thread Fit: Class 5g6g thread fit guarantees secure, accurate fastening with minimal risk of loosening in high-precision assemblies.
• Secure Hex Drive Engagement: 1.5 mm hex socket drive allows for high-torque installation and removal, reducing tool slippage and damage.
• Stable Shoulder Alignment: 25 mm smooth shoulder diameter provides precise component positioning and acts as a pivot or bearing surface.
• Wide Industrial Compatibility: Coarse 0.35 mm pitch and right-hand metric thread design ensure easy installation and compatibility with standard metric components.
• Regulatory Compliance & Safety: Meets ASTM A108, RoHS 3, and REACH standards, ensuring material safety and environmental responsibility.

Professional Applications & Engineering Value

This M1.6 shoulder screw is engineered to address critical alignment and durability challenges in precision machinery. The alloy steel construction, combined with a black oxide finish, resists corrosion and wear in demanding environments like automotive assemblies, electronics, and small mechanical devices. The 25 mm shoulder length and smooth texture provide a stable bearing surface, eliminating the need for separate spacers and reducing assembly complexity. With a Class 5g6g thread fit and coarse 0.35 mm pitch, it ensures quick, secure fastening while maintaining positional accuracy. The hex socket head allows for compact tool access, making it ideal for confined spaces where reliability is paramount.

Specification Summary & Compliance

This shoulder screw features a Class 5g6g thread fit with precise dimensional tolerances (shoulder diameter: -0.072 to -0.01 mm; shoulder length: 0 to 0.25 mm). It conforms to ASTM A108 specifications for material quality and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.