S-90044A246 3-56 x 1/4" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength (170,000 PSI) ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Precision Class 3A thread fit provides superior engagement and vibration resistance, maintaining clamp load integrity in machinery and equipment.
• Black-oxide coating on alloy steel offers enhanced corrosion resistance, extending service life in industrial environments without compromising dimensional tolerances.
• Fine UNF thread spacing delivers improved load distribution and holding power, ideal for applications requiring fine adjustment and secure fastening.
• Fully threaded design allows for maximum grip along the entire length, enabling versatile installation in various material thicknesses.
• Rockwell C37 hardness ensures high durability and wear resistance, minimizing deformation during repeated assembly and disassembly cycles.
• Standard hex socket drive (5/64") facilitates easy installation with common tools, reducing assembly time and improving workflow efficiency.

Professional Applications & Engineering Value

Engineered for precision and reliability, these socket head cap screws with 3-56 UNF fine threads and Class 3A fit address critical challenges in industrial assembly, such as vibration loosening and misalignment. The black-oxide alloy steel construction provides a durable, corrosion-resistant surface, ideal for automotive, aerospace, and heavy machinery applications where environmental factors and high loads are concerns. With a fully threaded rod and fine thread spacing, these fasteners ensure uniform stress distribution and superior clamping force, reducing the need for frequent maintenance. Compliant with ASTM A574, they meet rigorous standards for high-strength socket screws, offering engineers a trusted solution for securing components in tight spaces with consistent performance.

Specification Summary & Compliance

This product adheres to precise dimensional standards, including Class 3A thread fit for tight tolerances and UNF fine thread type with right-hand direction. Manufacturing conforms to ASTM A574 specifications, ensuring consistent quality and performance. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental safety and restricts hazardous substances, making these screws suitable for global industrial use.