S-95446A632 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 360 Brass material, ideal for harsh environments and electrical applications where rust prevention is critical.
• Superior mechanical strength offering 40,000 psi tensile and 22,000 psi shear strength for reliable performance under high-stress conditions.
• Precise alignment and smooth rotation enabled by the accurately machined 1/8" shoulder diameter and 7/16" shoulder length with tight tolerances.
• Easy installation and high torque transmission with the 5/64" hex socket drive, reducing tool slippage and assembly time.
• Consistent and secure fastening ensured by the 4-40 UNC coarse thread with Class 2A fit, providing excellent thread engagement and vibration resistance.
• Durable and wear-resistant construction with Rockwell B55 hardness, maintaining integrity through repeated use in mechanical assemblies.
• Compliance with global environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use in regulated industries.

Professional Applications & Engineering Value

This 360 Brass Shoulder Screw is engineered to address critical challenges in precision machinery, electronics, and automotive systems where alignment, conductivity, and corrosion resistance are paramount. The UNC coarse thread and Class 2A fit ensure rapid assembly and reliable hold in applications subject to vibration, such as rotating shafts and pivoting mechanisms. The smooth head texture and hex socket drive allow for flush mounting and high-torque installation without marring surfaces, making it ideal for consumer electronics and optical devices. Its brass construction provides excellent electrical conductivity and resistance to galvanic corrosion, essential in electrical enclosures and marine environments. By combining a precise shoulder with robust tensile strength, this screw minimizes play and wear in bushings and bearings, extending equipment lifespan and reducing maintenance costs in industrial automation and instrumentation.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. The shoulder features a diameter of 1/8" (tolerance: -0.002" to 0") and length of 7/16" (tolerance: 0" to 0.003") to ensure precise assembly. It is manufactured to meet RoHS 3 (2015/863/EU) compliance under exemption 6(c) for lead in copper alloys and is REACH (EC 1907/2006) compliant, verifying its suitability for use in regulated markets without hazardous substances.