S-8077A649 1/4"-20 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel and black oxide finish, ideal for harsh industrial environments.
• High tensile and shear strength (70,000 psi tensile, 35,000 psi shear) ensures reliable performance in high-stress applications.
• Precise Class 3A thread fit provides secure, vibration-resistant connections for critical assemblies.
• Knurled socket head with hex drive allows for easy installation and removal, reducing assembly time.
• Coarse UNC threading enables quick engagement and disassembly, improving maintenance efficiency.
• Compliance with ASME B18.3 guarantees consistent quality and interchangeability in professional use.
• RoHS 3 and REACH compliant for safe, environmentally responsible sourcing in global supply chains.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw with black oxide finish is engineered to address common industrial challenges like corrosion, vibration loosening, and high mechanical stress. The Class 3A thread fit and coarse UNC threading ensure precise alignment and robust fastening in machinery, automotive, and aerospace components. The knurled socket head enhances grip during tooling, reducing slippage in confined spaces. Ideal for pivots, guides, and rotating assemblies, it provides long-term durability and reliable shoulder screw performance under demanding conditions, minimizing downtime and maintenance costs.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit tolerances and UNC thread standards, with precise shoulder diameter and length tolerances for consistent performance. Manufactured in compliance with ASME B18.3 specifications, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and sustainability in industrial applications.