S-94383A460 3/8"-16 ASME B18.3, ASTM A574 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 140,000 psi tensile strength and 84,000 psi minimum shear strength for reliable performance in high-stress applications
• Superior corrosion resistance provided by the black oxide finish, extending service life in demanding industrial environments
• Precision thread engagement with Class 3A thread fit ensuring consistent, vibration-resistant connections in assembly operations
• Enhanced grip and torque application through the knurled socket head design combined with 1/4" hex drive for secure installation
• Optimized shoulder functionality with precise diameter and length tolerances for accurate component alignment and spacing
• Robust material performance from alloy steel with Rockwell C32 hardness, maintaining structural integrity under repeated use
• Broad industry compliance meeting ASME B18.3 specifications while being RoHS 3 and REACH compliant for global applications

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw delivers critical engineering solutions for precision assembly challenges. The alloy steel construction with black oxide finish provides exceptional durability against wear and environmental exposure, while the Class 3A thread fit ensures reliable fastening in vibrating machinery. The precisely machined shoulder with tight diameter and length tolerances enables accurate component positioning in industrial applications such as rotating assemblies, pivoting mechanisms, and precision guides. The socket head design with knurled texture and 1/4" hex drive facilitates secure installation in confined spaces, making it ideal for automotive, manufacturing, and heavy equipment applications where alignment accuracy and high tensile strength are paramount.

Specification Summary & Compliance

This shoulder screw features 3/8"-16 UNC coarse threads with Class 3A thread fit for precision engagement. Critical dimensions include shoulder diameter of 1/2" (tolerance: -0.004" to -0.002") and shoulder length of 1" (tolerance: -0.005" to 0.005"). Manufactured to ASME B18.3 specifications using ASTM A574 alloy steel, the fastener meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards for environmental safety and regulatory acceptance in global markets.