S-93985A309 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability: 416 Stainless Steel construction with Rockwell C26 hardness provides superior corrosion resistance and long-term reliability in harsh industrial environments.
• Precision Alignment: 1/2" shoulder length with tight ±0.002" tolerance ensures exact component positioning and reduces assembly misalignment issues.
• High Load Capacity: 120,000 psi tensile strength delivers exceptional mechanical strength for demanding applications requiring robust fastening solutions.
• Secure Fastening: Class 2A thread fit with UNC coarse threading offers reliable engagement and vibration resistance in high-stress assemblies.
• Easy Installation: 5/32" hex socket drive enables quick, tool-compatible installation with reduced risk of stripping compared to standard screw heads.
• Regulatory Compliance: Meets RoHS 3 and REACH environmental standards, ensuring safe usage across regulated industries and international markets.
• Versatile Shoulder Design: 3/8" shoulder diameter with precise fit tolerance provides stable bearing surfaces for rotating components and precision machinery.

Professional Applications & Engineering Value

This 416 Stainless Steel shoulder screw is engineered to address critical alignment and durability challenges in precision mechanical systems. The 1/2" shoulder length with tight ±0.002" tolerance provides an exact locating surface for rotating components, eliminating the need for additional bushings in assemblies. The UNC coarse thread with Class 2A fit ensures rapid installation while maintaining vibration resistance in high-speed equipment. With 120,000 psi tensile strength and corrosion-resistant properties, it outperforms standard fasteners in manufacturing equipment, automation systems, and precision instruments where dimensional stability under load is paramount. The hex socket drive design allows for secure tool engagement in confined spaces, reducing installation time and improving workplace efficiency.

Specification Summary & Compliance

This precision shoulder screw maintains Class 2A thread fit per UNC standards with exact dimensional control. The shoulder diameter (3/8") and length (1/2") feature tight manufacturing tolerances for precision applications. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and international market acceptance. Mechanical properties include 120,000 psi tensile strength and Rockwell C26 hardness for consistent performance in industrial environments.