S-96706A303 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extended service life.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high-stress conditions.
• Precise assembly and alignment ensured by the Class 3A thread fit and a consistent 1/2" shoulder length for accurate component positioning.
• Secure, non-slip fastening facilitated by the knurled head and standard hex socket drive, allowing for high-torque installation.
• Broad industrial compatibility with UNC coarse threads (1/4"-20) and right-hand direction, fitting common machinery and equipment.
• Enhanced durability from a Rockwell B55 hardness rating, resisting wear and deformation in demanding applications.
• Compliance with global regulations, being RoHS 3 and REACH compliant, ensuring safe and unrestricted use in various markets.

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address critical challenges in precision assembly and rotational machinery. The 1/2" shoulder length provides a stable bearing surface, preventing axial movement and misalignment in pulleys, gears, and linkages. Its Class 3A thread fit and UNC coarse threads ensure tight, secure fastening with reduced risk of cross-threading, vital for high-vibration environments. The knurled head and hex socket drive allow for firm grip and efficient installation, even in confined spaces. With a high tensile strength of 70,000 psi and excellent corrosion resistance, it delivers long-term reliability in automotive, aerospace, and industrial equipment applications, minimizing downtime and maintenance costs.

Specification Summary & Compliance

This shoulder screw adheres to precise dimensional standards, including a Class 3A thread fit for superior engagement and a shoulder diameter tolerance of -0.004" to -0.002". It conforms to UNC thread standards with a 1/4"-20 coarse thread and right-hand direction. Manufactured from 18-8 stainless steel with a Rockwell B55 hardness, it meets rigorous performance criteria. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial use.