S-91251A234 4-48 x 1/8" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength (170,000 psi) for reliable performance in high-stress applications
• Precision Class 3A thread fit ensures superior engagement and vibration resistance
• Black-oxide surface treatment provides corrosion resistance and enhanced durability
• Fine thread spacing (UNF) delivers improved clamping force and better adjustment control
• Fully threaded design allows for maximum grip length and versatile installation options
• Hex socket drive (3/32") enables high-torque installation in confined spaces
• ASTM A574 compliance guarantees consistent quality and mechanical properties

Professional Applications & Engineering Value

These 4-48 UNF Class 3A socket head cap screws deliver critical performance advantages in precision assemblies where space constraints and reliability are paramount. The black-oxide alloy steel construction provides excellent corrosion resistance while maintaining the 170,000 psi tensile strength needed for demanding applications. The fine thread spacing and Class 3A thread fit ensure superior vibration resistance and precise clamping force distribution, making them ideal for aerospace components, precision instruments, and industrial machinery where right-hand thread fasteners must maintain integrity under dynamic loads. The combination of Rockwell C37 hardness and fully threaded design offers optimal strength-to-weight ratio while accommodating various material thicknesses.

Specification Summary & Compliance

This socket head cap screw features precision 4-48 UNF Class 3A threads with fine thread spacing and right-hand orientation. Manufactured to ASTM A574 specifications, it meets rigorous mechanical property requirements. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial applications where material restrictions apply.