S-97345A215 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance in harsh environments due to 316 stainless steel construction, ideal for chemical and marine applications.
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads, reducing the risk of fastener failure.
• Precision Class 3A thread fit provides consistent engagement and vibration resistance, minimizing loosening in dynamic assemblies.
• Knurled socket head with 5/64" hex drive offers secure tool grip and easy installation, even in confined spaces.
• RoHS 3 and REACH compliance guarantees environmental safety and regulatory adherence for global industrial use.
• Coarse UNC threads enable quick assembly and disassembly, saving time in maintenance and production cycles.
• Durable shoulder design with precise diameter and length tolerances supports accurate alignment in rotating components.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw with 4-40 UNC coarse threads and Class 3A fit is engineered to address critical challenges in industrial settings, such as corrosion-induced degradation and misalignment in mechanical systems. The socket head with knurled texture ensures tool stability during installation, while the right-hand thread direction and coarse spacing facilitate rapid assembly in high-volume production. Its 70,000 psi tensile strength and 35,000 psi shear capacity provide robust support for applications like precision machinery, automotive components, and electronic enclosures, where chemical resistance and long-term reliability are paramount. By integrating a standardized shoulder diameter and length, it minimizes wear in bushings and bearings, enhancing operational efficiency.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A precision fit for tight tolerances, ensuring consistent thread engagement. Dimensions include a thread size of 4-40, shoulder diameter of 1/8" (tolerance: -0.004" to -0.002"), and shoulder length of 1 1/4" (tolerance: -0.005" to 0.005"). It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming its suitability for regulated industrial applications without hazardous substances.