S-90807A141 1/2"-13 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 140,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
• Corrosion-resistant black oxide finish enhances durability and provides protection in harsh industrial environments, extending service life.
• Precise Class 3A thread fit guarantees secure, vibration-resistant connections with minimal backlash in assembly applications.
• Knurled socket head with hex drive offers superior grip and torque application, facilitating quick installation and removal with standard tools.
• Alloy steel construction with Rockwell C32 hardness delivers excellent wear resistance and maintains dimensional stability under load.
• Accurate shoulder dimensions enable consistent alignment and spacing in machinery, reducing assembly time and improving operational efficiency.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and suitability for global industrial supply chains.

Professional Applications & Engineering Value

This alloy steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. The 1/2"-13 UNC coarse threads with Class 3A fit provide robust, secure fastening that resists loosening under dynamic loads, while the black oxide finish offers reliable corrosion protection in humid or abrasive conditions. The knurled socket head and hex drive design allow for efficient torque transmission, minimizing slippage during maintenance. Ideal for use in industrial applications such as jigs, fixtures, and rotating assemblies, this shoulder screw ensures precise component alignment and long-term reliability, reducing downtime and maintenance costs.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for high precision. Key dimensions include a shoulder diameter of 1/2" with a tolerance of -0.004" to -0.002" and a shoulder length of 1/4" with a tolerance of -0.005" to 0.005". It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements, ensuring it is free from hazardous substances and suitable for industrial use globally.