S-91259A415 8-32 ASME B18.3, ASTM A574 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional shear resistance with minimum 84,000 psi shear strength, reducing failure risks in high-stress assemblies.
• Precise Class 3A thread fit ensures smooth engagement and reliable fastening in demanding applications.
• High tensile strength of 140,000 psi provides durability under heavy loads and vibration.
• Black oxide finish offers corrosion resistance and a non-reflective surface for harsh environments.
• Socket hex drive design allows for easy installation with standard tools in confined spaces.
• ASME B18.3 compliance guarantees dimensional accuracy and interchangeability in industrial systems.
• RoHS 3 and REACH compliant for safe use in regulated industries without hazardous substances.

Professional Applications & Engineering Value

This alloy steel shoulder screw with 8-32 UNC coarse threads and black oxide finish is engineered to address common industrial challenges like misalignment and component wear. The shoulder diameter of 7/32" and precise Class 3A thread fit ensure accurate positioning in machinery, reducing play and enhancing stability. Ideal for precision assemblies in robotics, automotive, and aerospace, it withstands high shear and tensile stresses up to 140,000 psi, minimizing maintenance needs. The socket head with hex drive simplifies installation in tight spaces, while the corrosion-resistant finish extends service life in demanding environments, providing reliable performance in industrial fasteners applications.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit with 8-32 UNC coarse threads and a shoulder diameter tolerance of -0.004" to -0.002" for precise alignment. Manufactured to ASME B18.3 specifications using ASTM A574 alloy steel, it ensures consistent quality and interchangeability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets environmental and safety standards for industrial use.