S-91273A273 3/4"-10 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments and extended service life.
• Enhanced torque application and grip provided by the knurled hex socket head, reducing tool slippage during installation.
• High mechanical strength and reliability with a tensile strength of 70,000 psi and a minimum shear strength of 35,000 psi for demanding applications.
• Precise component alignment and pivot points enabled by the consistent 3/4" shoulder diameter and 1 1/4" shoulder length.
• Easy and quick assembly with a coarse UNC thread and Class 2A thread fit, ensuring smooth engagement and reduced installation time.
• Durable, long-lasting performance backed by a Rockwell B55 hardness rating, resisting wear and deformation under load.
• Compliance with global environmental standards, being RoHS 3 and REACH compliant for use in regulated markets.

Professional Applications & Engineering Value

This 3/4"-10 UNC shoulder screw is engineered to address critical challenges in machinery assembly, automation systems, and precision equipment. The 18-8 Stainless Steel material offers excellent resistance to rust and oxidation, making it suitable for washdown environments, food processing, and outdoor applications. The knurled hex socket head ensures secure tool engagement, minimizing the risk of stripping and improving operator safety during high-torque fastening. The precision-ground shoulder acts as a reliable bearing surface or pivot, maintaining accurate alignment of moving parts like gears, pulleys, and linkages. Its coarse thread and Class 2A thread fit provide reliable holding power and vibration resistance in heavy-duty assemblies, reducing maintenance needs and downtime.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent, reliable engagement. The shoulder diameter is manufactured to a tight tolerance of -0.004" to -0.002", and the shoulder length is held to -0.005" to 0.005", ensuring precise dimensional accuracy. It is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in products requiring adherence to strict environmental and safety standards.