S-94105A323 4-40 x 5/16" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit ensuring tight, secure fastening in demanding applications
• Exceptional durability from Rockwell C45 hardness alloy steel, resisting wear and deformation under high stress
• Enhanced corrosion resistance with black-oxide coating, extending service life in harsh industrial environments
• Reliable installation via 0.050" hex drive, allowing high torque application without cam-out in confined spaces
• Precise positioning with flat tip design, providing consistent surface contact and minimizing component damage
• Broad compatibility with coarse UNC 4-40 threads, facilitating quick assembly and disassembly
• Regulatory compliance meeting ASME B18.3 standards for consistent quality and performance

Professional Applications & Engineering Value

This 4-40 UNC set screw delivers critical engineering solutions for industrial machinery, automotive components, and precision equipment where vibration resistance and positional accuracy are paramount. The black-oxide alloy steel construction combined with Rockwell C45 hardness prevents loosening under dynamic loads, while the headless design and hex drive enable flush mounting in space-constrained assemblies. Its Class 3A thread fit and coarse threading ensure rapid installation with minimal cross-threading risk, making it ideal for high-volume production environments requiring reliable set screw performance.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit precision and UNC 4-40 coarse threads. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Dimensions include 5/16" length, 0.050" hex drive, and flat tip configuration per inch measurement system standards.