S-92012A506 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional durability and corrosion resistance with black oxide finish, ideal for demanding industrial environments
• High tensile strength of 140,000 psi ensures reliable performance under heavy loads and vibration
• Precise shoulder fit with minimal tolerance guarantees accurate alignment and reduces assembly errors
• Rockwell C32 hardness provides excellent wear resistance for extended service life
• Coarse UNC thread with Class 2A fit enables quick installation and secure fastening in various materials
• Socket head with 5/64" hex drive allows for easy access and torque application in confined spaces
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and global market acceptance

Professional Applications & Engineering Value

This 4-40 UNC shoulder screw is engineered to address critical alignment and load-bearing challenges in precision assemblies. The alloy steel construction combined with a black oxide finish offers superior corrosion protection, making it suitable for automotive, aerospace, and machinery applications where exposure to harsh conditions is common. The precise shoulder diameter and length tolerances ensure exact positioning of components like gears, bearings, and linkages, minimizing play and enhancing operational accuracy. Its coarse thread design facilitates faster installation in soft materials or when frequent disassembly is required, while the socket head drive provides reliable torque transmission without stripping. By integrating high tensile strength and hardness, this screw reduces the risk of failure in high-stress environments, supporting efficient and durable industrial assembly processes.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent engagement and ease of assembly. Dimensions include a shoulder diameter of 1/8" with a tolerance of -0.001" to 0", and a shoulder length of 3/4" with a tolerance of 0" to 0.002", ensuring precision fit in applications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated industries.