S-94383A180 10-24 ASME B18.3, ASTM A574 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength – Withstands up to 140,000 psi for reliable performance in high-stress applications.
• Precision Thread Fit – Class 3A UNC coarse thread ensures secure, vibration-resistant fastening.
• Durable Corrosion Resistance – Black oxide finish protects against wear and extends service life in harsh environments.
• Enhanced Grip & Stability – Knurled head and 1/8" hex drive provide superior torque application and slip resistance.
• Accurate Shoulder Alignment – Tight tolerances on shoulder diameter and length enable precise component positioning.
• High Hardness Rating – Rockwell C32 hardness maintains structural integrity under repeated loads.
• Broad Compliance – Meets ASME B18.3, RoHS 3, and REACH standards for safe, regulated use.

Professional Applications & Engineering Value

This alloy steel shoulder screw with a black oxide finish is engineered to address critical alignment and durability challenges in industrial settings. The 10-24 UNC coarse thread and Class 3A fit deliver robust, vibration-resistant connections, ideal for machinery, automotive assemblies, and precision equipment. The 3/8" shoulder length and controlled tolerances ensure accurate part spacing and rotational stability, reducing misalignment issues. With a socket head and hex drive, installation is streamlined even in confined spaces, while the high tensile and shear strength supports heavy-duty applications without failure.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit and UNC coarse thread standards, with shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". Manufactured under ASME B18.3 specifications using ASTM A574 alloy steel, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.