S-94383A230 1/4"-20 ASME B18.3, ASTM A574 Shoulder Screws

Key Features & Benefits at a Glance

• Extended service life through alloy steel construction and black oxide finish providing excellent corrosion resistance
• Superior load-bearing capacity with 140,000 psi tensile strength and 84,000 psi shear strength for demanding applications
• Precise component alignment enabled by the 7/16" shoulder length with tight tolerances for consistent performance
• Enhanced torque transmission via Rockwell C32 hardness and Class 3A thread fit ensuring reliable fastening
• Easy installation and removal with hex drive socket and knurled head for superior grip during assembly
• Industry-standard compatibility through 1/4"-20 UNC coarse threads meeting ASME B18.3 specifications
• Environmental compliance assurance with full RoHS 3 and REACH compliance for global manufacturing requirements

Professional Applications & Engineering Value

This high-strength shoulder screw delivers exceptional engineering value in precision assembly applications where alignment and durability are critical. The alloy steel construction with black oxide finish provides superior corrosion resistance in industrial environments, while the 7/16" shoulder length with precise tolerances ensures accurate component positioning in machinery, pivoting mechanisms, and rotating assemblies. The 1/4"-20 UNC coarse thread design offers excellent engagement in various materials, and the socket head with hex drive combined with knurled texture prevents tool slippage during high-torque applications. With 140,000 psi tensile strength and Rockwell C32 hardness, this fastener maintains integrity under heavy loads, making it ideal for automotive, aerospace, and industrial equipment where reliability is non-negotiable.

Specification Summary & Compliance

This shoulder screw features precision Class 3A thread fit with 1/4"-20 UNC coarse threads and maintains tight shoulder diameter tolerance of -0.004" to -0.002" with shoulder length tolerance of -0.005" to 0.005". Manufactured to ASME B18.3 specifications with material compliance to ASTM A574, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications requiring strict regulatory adherence.