S-8077A362 8-32 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction and Black Oxide finish, ideal for harsh industrial environments
• High-strength performance delivering 70,000 psi tensile and 35,000 psi shear strength for reliable heavy-duty applications
• Precise thread engagement with Class 3A fit and UNC coarse threads ensuring secure, vibration-resistant connections
• Easy installation and removal featuring a knurled socket head with hex drive for improved grip and torque application
• Accurate shoulder positioning with 1/4" diameter and 1/2" length providing consistent alignment in assemblies
• Enhanced durability with Rockwell B79 hardness for long-lasting performance under mechanical stress
• Full regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for safe, quality-assured use

Professional Applications & Engineering Value

This 8-32 UNC shoulder screw is engineered to address critical alignment and durability challenges in precision machinery, automotive, and aerospace assemblies. The 316 Stainless Steel material combined with a Black Oxide finish provides exceptional resistance to corrosion and wear, extending service life in demanding conditions. The Class 3A thread fit and coarse UNC threading ensure tight, reliable fastening that resists loosening under vibration, while the knurled socket head allows for efficient installation with standard hex tools. Ideal for applications requiring precise shoulder positioning, such as rotating shafts or bearing mounts, this screw enhances assembly accuracy and reduces maintenance needs, delivering consistent performance in high-stress environments.

Specification Summary & Compliance

This shoulder screw features precise dimensional tolerances, including a shoulder diameter of 1/4" with a tolerance of -0.004" to -0.002" and a shoulder length of 1/2" with a tolerance of -0.005" to 0.005". Thread specifications include 8-32 UNC coarse threads with a Class 3A fit for superior engagement. The product complies with ASME B18.3 manufacturing standards and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial reliability.