S-94383A160 10-24 ASME B18.3, ASTM A574 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability – Alloy steel construction with Rockwell C32 hardness ensures long-lasting performance in demanding industrial environments.
• Superior Corrosion Resistance – Black oxide finish provides reliable protection against rust and extends service life in harsh conditions.
• High Tensile & Shear Strength – 140,000 psi tensile strength and 84,000 psi minimum shear strength offer exceptional load-bearing capacity for critical assemblies.
• Precision Shoulder Fit – 1/4" shoulder diameter with tight tolerances ensures accurate alignment and smooth rotation in machinery and fixtures.
• Easy Installation & Removal – Hex socket drive (1/8") and knurled head allow for secure tool engagement and quick assembly without slippage.
• Wide Compatibility – 10-24 UNC coarse threading with Class 3A fit guarantees secure fastening and interchangeability in standard applications.
• Regulatory Compliance – Meets ASME B18.3 standards and is RoHS 3/REACH compliant, ensuring safety and environmental adherence.

Professional Applications & Engineering Value

This alloy steel shoulder screw is engineered to address common industrial challenges such as misalignment, vibration loosening, and component wear. The 1/4" shoulder diameter with precise tolerances provides a stable pivot or spacer in assemblies, reducing stress on threaded sections. The black oxide finish enhances corrosion resistance, making it suitable for automotive, aerospace, and machinery applications where exposure to moisture or chemicals is a concern. Combined with 10-24 UNC coarse threading and Class 3A fit, it ensures reliable fastening in high-vibration environments, while the hex socket drive facilitates easy installation in confined spaces. Ideal for use in jigs, fixtures, and rotating mechanisms, this screw delivers consistent performance and reduces maintenance downtime.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 specifications with a Class 3A thread fit for superior precision. Key dimensions include a shoulder diameter of 1/4" (tolerance: -0.004" to -0.002") and shoulder length of 1" (tolerance: -0.005" to 0.005"). The 10-24 UNC coarse thread and right-hand direction ensure compatibility with standard components. It is manufactured from alloy steel and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming its suitability for regulated industrial and export markets.