S-94361A341 5/16"-24 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength – With 140,000 psi tensile strength, this shoulder screw withstands high-stress applications without failure, ensuring long-term reliability.
• Superior Corrosion Resistance – The black oxide finish provides enhanced protection against rust and wear, extending service life in harsh industrial environments.
• Precision Thread Fit – Class 3A UNF fine threads offer tighter tolerances and better vibration resistance, reducing the risk of loosening in dynamic assemblies.
• High Hardness & Durability – Rockwell C32 hardness ensures the screw maintains its shape and strength under repeated loads, minimizing deformation.
• Secure Knurled Head Grip – The knurled socket head design allows for easy installation and removal with standard hex tools, improving assembly efficiency.
• Accurate Shoulder Alignment – Tight shoulder diameter and length tolerances ensure precise component positioning, critical for machinery and fixture applications.
• Compliant with Environmental Standards – Meets RoHS 3 and REACH regulations, making it suitable for global industrial supply chains without compliance concerns.

Professional Applications & Engineering Value

This alloy steel shoulder screw is engineered to address common challenges in precision machinery, automation systems, and heavy-duty equipment. The 5/16"-24 UNF fine thread with Class 3A fit provides superior resistance to vibration and loosening, which is crucial in dynamic environments like robotics or conveyor systems. The black oxide finish not only enhances corrosion resistance but also reduces friction during installation. With a knurled socket head and hex drive, it ensures secure tool engagement, speeding up assembly in tight spaces. The precisely machined shoulder—with controlled diameter and length tolerances—enables accurate alignment of moving parts, reducing wear and improving operational efficiency. Ideal for use in pivots, gears, and linkages, this screw delivers reliable performance where high strength and dimensional stability are non-negotiable.

Specification Summary & Compliance

This shoulder screw adheres to UNF fine thread standards with a Class 3A thread fit for high precision. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring consistent alignment. Manufactured from alloy steel with a Rockwell C32 hardness and 140,000 psi tensile strength, it meets rigorous mechanical demands. The product is RoHS 3 (2015/863/EU) compliant under exemption 6(a) and REACH (EC 1907/2006) compliant, confirming its suitability for industrial and international markets.