S-93985A308 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability: 416 Stainless Steel construction provides excellent corrosion resistance and long-term reliability in demanding industrial environments.
• Superior Strength: High 120,000 psi tensile strength and Rockwell C26 hardness ensure the screw withstands heavy loads and resists deformation.
• Precise Alignment: Accurately machined 3/8" diameter shoulder with tight tolerances guarantees exact component positioning and reduces assembly errors.
• Secure Fastening: Class 2A UNC coarse threads offer reliable engagement and easier assembly compared to fine threads, speeding up production.
• Easy Installation: Hex socket head with 5/32" drive allows for high-torque application using standard tools, minimizing slip and tool wear.
• Regulatory Compliance: Meets RoHS 3 and REACH standards, ensuring safety and environmental responsibility for global supply chains.
• Versatile Design: Right-hand thread and standard socket head profile make it compatible with common machinery and replacement parts.

Professional Applications & Engineering Value

This 1/4"-20 UNC shoulder screw is engineered to address critical alignment and wear issues in precision assemblies. The 416 Stainless Steel material offers robust resistance to corrosion and wear, ideal for environments exposed to moisture or chemicals. The precise shoulder diameter and length (3/8" with tight tolerances) act as a reliable pivot or spacer, eliminating misalignment in rotating parts like bearings, pulleys, or guides. Commonly used as stripper bolts or guide pins in manufacturing jigs and automation equipment, its coarse thread ensures quick installation and high clamp force. The hex socket head design allows for flush mounting in confined spaces, reducing protrusion and improving safety. This combination of high tensile strength and exact dimensions minimizes downtime and maintenance, providing consistent performance in automotive, aerospace, and machinery applications.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC thread with Class 2A fit for standard tolerance and easy assembly. The shoulder dimensions include a 3/8" diameter (-0.001" to 0" tolerance) and 3/8" length (0" to 0.002" tolerance), ensuring precise fit. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances. Manufactured to industry standards for shoulder screws, it guarantees reliability in mechanical and structural applications.