S-91273A703 5/8"-11 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance thanks to 18-8 stainless steel construction and a protective black oxide finish, ideal for harsh industrial environments.
• Precise alignment and reduced wear with a 5" shoulder length manufactured to tight tolerances (±0.005"), ensuring accurate component positioning.
• High-strength performance under load with a tensile strength of 70,000 psi and a minimum shear strength of 35,000 psi for demanding applications.
• Reliable, coarse-thread engagement provided by the 5/8"-11 UNC thread with a Class 2A fit, offering secure fastening and vibration resistance.
• Secure and easy installation with a hex drive socket head and knurled texture, allowing for high torque application and improved grip.
• Consistent material durability ensured by a Rockwell B55 hardness, providing excellent wear resistance and long service life.
• Compliance with global environmental standards, being RoHS 3 and REACH compliant, making it suitable for regulated industries.

Professional Applications & Engineering Value

This 5/8"-11 UNC shoulder screw is engineered to solve critical alignment and strength challenges in industrial applications. The precision-machined 5" shoulder length with minimal tolerance variation acts as a pivot, axle, or spacer, preventing component misalignment and reducing wear in machinery, automotive assemblies, and heavy equipment. Manufactured from 18-8 Stainless Steel and finished with a black oxide coating, it offers superior corrosion resistance, extending component life even in moist or chemically aggressive environments. The coarse UNC thread and Class 2A thread fit ensure quick assembly and a secure hold against vibrations, while the hex drive socket head with a knurled texture facilitates installation in confined spaces, making it a reliable precision shoulder fastener for high-stress engineering projects.

Specification Summary & Compliance

This shoulder screw features a 5/8"-11 UNC thread with a Class 2A fit and a shoulder diameter tolerance of -0.004" to -0.002". The shoulder length is held to a tight tolerance of -0.005" to 0.005". It is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial use.