S-92981A794 M6 ASTM A108 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Durability: Crafted from alloy steel with a black oxide finish to significantly enhance corrosion resistance, ensuring long-lasting performance in demanding industrial environments.
• Precision Alignment & Pivot Function: The 90mm shoulder length with tight tolerances provides a precise bearing surface, reducing wear and simplifying assembly in jigs, fixtures, and linkages.
• High Tensile Strength for Demanding Loads: With a 140,000 psi tensile strength and Rockwell C32 hardness, this screw reliably withstands high-stress applications without failure.
• Secure & Easy Installation: The knurled head and 4 mm hex drive offer superior grip and torque transmission, preventing tool slippage and speeding up the assembly process.
• Reliable Thread Engagement: Class 5g6g thread fit on the M6x1 mm coarse pitch ensures consistent, secure fastening and compatibility with standard metric components.
• Compliance & Quality Assurance: Manufactured to meet ASTM A108 specifications and compliant with RoHS 3 and REACH standards, guaranteeing material quality and environmental safety.
• Versatile Industrial Use: The robust socket head shoulder screw design is ideal for a wide range of machinery, automation, and precision engineering applications.

Professional Applications & Engineering Value

This M6 shoulder screw is engineered to solve critical alignment and pivot challenges in precision assemblies. The extended 90mm shoulder length acts as a precise datum or axle, eliminating the need for separate bushings and reducing component count in industrial machinery, automation systems, and jig and fixture designs. The alloy steel core, hardened to Rockwell C32, provides the necessary structural integrity to handle rotational and axial loads without deformation. Paired with the black oxide finish, it offers enhanced resistance to rust in non-plated applications, extending service life. The combination of a knurled head for hand-tightening and a 4 mm hex drive ensures quick, secure installation in confined spaces, making it a versatile and reliable metric shoulder bolt for engineers seeking to optimize performance and assembly efficiency.

Specification Summary & Compliance

This precision shoulder screw features an M6x1 mm coarse pitch thread with a Class 5g6g thread fit for standard metric compatibility. The shoulder diameter is 8 mm with a tolerance of -0.072 to -0.01 mm, and the shoulder length is 90 mm with a tolerance of 0 to 0.25 mm, ensuring high dimensional accuracy. It is manufactured in accordance with ASTM A108 standards and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.