S-94361A345 5/16"-24 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capacity – With 140,000 psi tensile strength and Rockwell C32 hardness, this alloy steel shoulder screw withstands high-stress applications without deformation.
• Precise Alignment & Stability – The accurately machined shoulder (3/8" diameter, 1 1/8" length) ensures components remain perfectly aligned, reducing wear and vibration in assemblies.
• Superior Corrosion Resistance – Black oxide finish provides durable protection against rust and oxidation, extending service life in harsh industrial environments.
• Secure, Non-Slip Installation – Knurled socket head with 3/16" hex drive offers enhanced grip and torque transmission, preventing tool slippage during tightening.
• Reliable Thread Engagement – Class 3A thread fit with 5/16"-24 UNF fine threading ensures tight, secure fastening with minimal risk of loosening under dynamic loads.
• Compliance with Global Standards – Meets RoHS 3 and REACH regulations, making it suitable for use in regulated industries and international supply chains.

Professional Applications & Engineering Value

This alloy steel shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery, automation systems, and precision equipment. The black oxide finish not only enhances corrosion resistance but also reduces friction during assembly, while the Class 3A thread fit and UNF fine threading provide exceptional clamping force and vibration resistance. The precisely toleranced shoulder (3/8" diameter, 1 1/8" length) acts as a reliable pivot or spacer, maintaining component alignment in high-load applications such as rotating assemblies, conveyor systems, and robotic arms. By combining high tensile strength with a knurled socket head for secure drive engagement, this fastener minimizes downtime and maintenance costs in demanding operational environments.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit tolerances for precise engagement, with 5/16"-24 UNF fine threading and a shoulder diameter tolerance of -0.004" to -0.002". Manufactured from alloy steel with a tensile strength of 140,000 psi and Rockwell C32 hardness, it complies with RoHS 3 (2015/863/EU) under exemption 6(a) and REACH (EC 1907/2006) regulations, ensuring suitability for industrial and export-oriented applications.