S-91375A646 3/8"-24 x 3/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating for extended service life in demanding industrial environments
• Precise thread engagement with Class 3A fit ensuring reliable, vibration-resistant fastening in critical applications
• Maximum torque transmission through hex drive design for secure installation without head protrusion
• Enhanced gripping power with cup tip design that bites into materials for permanent positioning
• Exceptional mechanical strength from Rockwell C45 hardened alloy steel preventing deformation under heavy loads
• Fine thread advantage providing better adjustment precision and superior resistance to loosening
• Regulatory compliance assurance meeting both RoHS 3 and REACH environmental standards for global applications

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional performance in precision assembly applications where space constraints and vibration resistance are critical concerns. The headless hex drive design allows for flush mounting in tight spaces while providing maximum torque application during installation. Engineered with 3/8"-24 UNF fine threads and Class 3A precision fit, this fastener maintains secure positioning in pulleys, gears, and collars despite continuous operational stresses. The cup tip configuration creates positive mechanical locking by embedding into shaft materials, preventing rotational slippage in high-torque transmission systems. Ideal for manufacturing equipment, automotive components, and industrial machinery where reliable, permanent fastening solutions are essential for operational safety and reduced maintenance intervals.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread tolerance for superior fit and consistent performance. The UNF fine thread system (3/8"-24) ensures precise engagement while the Rockwell C45 hardness rating guarantees mechanical integrity. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making this set screw suitable for international industrial applications requiring certified components.