S-94496A640 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for reliable performance in demanding applications
• Enhanced corrosion resistance through zinc plating, extending service life in various industrial environments
• Precision alignment capability with standard shoulder fit and 2 1/8" shoulder length for accurate component positioning
• Easy installation and removal with external hex drive design and smooth head texture for efficient tool engagement
• Consistent thread performance through Class 2A thread fit and UNC coarse thread spacing, preventing cross-threading issues
• Durable material construction using steel with Rockwell B80 hardness, ensuring long-term mechanical integrity
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for environmentally responsible manufacturing

Professional Applications & Engineering Value

This 1/4"-20 UNC shoulder screw delivers exceptional engineering value in precision applications where component alignment and rotational stability are critical. The steel construction with zinc plating provides both mechanical strength and corrosion protection, solving common industrial challenges of premature fastener failure in harsh environments. The external hex drive enables quick installation and secure tightening, while the coarse thread spacing ensures reliable engagement in various materials. The precisely machined shoulder with 2 1/8" length acts as a permanent spacer or pivot point, eliminating the need for additional components in assemblies requiring precise axial positioning. These features make it ideal for machinery, automotive, and manufacturing equipment where shoulder mounting solutions demand both accuracy and durability under substantial mechanical stress.

Specification Summary & Compliance

This shoulder screw maintains Class 2A thread fit tolerance with UNC coarse thread profile, ensuring consistent engagement and proper clearances. The shoulder diameter tolerance of -0.004" to 0" and shoulder length tolerance of -0.005" to 0.005" guarantee precise dimensional control for accurate assembly. Manufactured to industry standards, the product is RoHS 3 (2015/863/EU) compliant with exemption 6(a) and REACH (EC 1907/2006) compliant, meeting current environmental regulations for industrial components.