S-94361A148 3/8"-24 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capacity: With a tensile strength of 140,000 psi and Rockwell C32 hardness, this shoulder screw reliably handles high-stress applications without deformation.
• Precision Alignment & Reduced Wear: The 1 1/2" shoulder with tight diameter tolerance (-0.004" to -0.002") ensures accurate component positioning, minimizing misalignment and extending part life.
• Secure Fastening in Fine-Pitch Applications: The 3/8"-24 UNF fine thread with Class 3A fit provides superior vibration resistance and holding power in dynamic environments.
• Enhanced Corrosion & Wear Resistance: The black oxide finish offers durable protection against rust and abrasion, suitable for demanding industrial conditions.
• Easy Installation & Removal: The knurled socket head with 1/4" hex drive allows for quick, slip-resistant tool engagement, reducing assembly time.
• Regulatory Compliance for Global Markets: Meets RoHS 3 and REACH standards, ensuring safe use in electronics, machinery, and export-focused projects.
• Versatile Shoulder Design: The standard shoulder fit accommodates pivots, spacers, and rotating components, simplifying mechanical designs.

Professional Applications & Engineering Value

This alloy steel shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 3/8"-24 UNF fine thread with Class 3A fit ensures tight, reliable fastening in high-vibration equipment like robotics, automotive fixtures, and conveyor systems. The 1 1/2" shoulder length with minimal tolerance variations provides a stable bearing surface for rotating parts, reducing wear on connected components. Combined with the black oxide finish, it resists corrosion in humid or abrasive settings, making it ideal for manufacturing jigs, aerospace tooling, and packaging machinery. The socket head design with knurling enhances grip during installation, streamlining maintenance in tight spaces while maintaining high tensile strength for long-term performance.

Specification Summary & Compliance

This shoulder screw adheres to UNF thread standards with a Class 3A thread fit for precision engagement. Dimensions include a shoulder diameter of 1/2" (tolerance: -0.004" to -0.002") and shoulder length of 1 1/2" (tolerance: -0.005" to 0.005"), ensuring consistent performance. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting use in regulated industries.