S-92012A401 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability: Alloy steel construction with black oxide finish provides superior corrosion resistance and extended service life in demanding industrial environments.
• High Tensile Strength: Rated at 140,000 PSI tensile strength to withstand heavy loads and prevent mechanical failure in critical assemblies.
• Precise Shoulder Alignment: Controlled shoulder diameter (3/8") and length (5/16") with tight tolerances ensure accurate component positioning and reduced vibration.
• Secure Fastening: Class 2A thread fit with coarse UNC threading offers reliable engagement and resistance to loosening under dynamic loads.
• Easy Installation: Hex socket drive (3/16") allows for high-torque application in confined spaces without stripping.
• Consistent Hardness: Rockwell C32 hardness maintains structural integrity and wear resistance through repeated use cycles.
• Regulatory Compliance: Meets RoHS 3 and REACH standards for safe use in regulated industries and international markets.

Professional Applications & Engineering Value

This precision shoulder screw delivers exceptional engineering value through its alloy steel composition and black oxide surface treatment, specifically engineered to address common industrial challenges. The UNC coarse thread design ensures rapid assembly in high-volume production while maintaining vibration resistance, crucial for machinery subjected to continuous operation. The precisely machined shoulder diameter acts as a reliable pivot or bearing surface in rotating assemblies, eliminating the need for additional spacers in industrial equipment. With its socket head design and 3/16" hex drive, installers achieve secure fastening in limited-access applications without compromising torque transmission. The combination of 140,000 PSI tensile strength and controlled shoulder length tolerance makes it ideal for precision alignment in automotive jigs, conveyor systems, and robotic arms where dimensional accuracy directly impacts operational reliability.

Specification Summary & Compliance

This shoulder screw maintains Class 2A thread fit per UNC standards with precise shoulder diameter tolerance (-0.001" to 0") and shoulder length tolerance (0" to 0.002") for consistent performance. Manufacturing adheres to industry standards for right-hand thread direction and coarse thread spacing. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability.