S-90298A827 1/2"-13 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh environments and extended service life.
• Exceptional thread reliability due to Class 3A fit, ensuring precise, vibration-resistant connections in critical assemblies.
• High-strength durability from Rockwell B55 hardness, providing dependable performance under mechanical stress.
• Secure and easy installation with a knurled hex socket head, offering superior grip and torque transmission.
• Accurate component alignment thanks to the precisely machined shoulder with tight diameter and length tolerances.
• Broad industry compatibility with UNC coarse threads, facilitating quick assembly and disassembly.
• Guaranteed quality and safety through compliance with ASME B18.3, RoHS 3, and REACH standards.

Professional Applications & Engineering Value

This high-precision shoulder screw is engineered to solve critical alignment and pivot point challenges in demanding industrial applications. Manufactured from 18-8 stainless steel with a passivated finish, it resists corrosion in moist or chemical-laden environments, reducing maintenance and replacement costs. The 1/2"-13 UNC coarse thread and Class 3A thread fit ensure a secure, vibration-resistant fastening, vital for machinery, automotive assemblies, and precision equipment. The knurled hex socket head allows for high-torque installation without slippage, while the accurately machined shoulder provides a reliable bearing surface for rotating parts, minimizing wear and ensuring smooth operation.

Specification Summary & Compliance

This shoulder screw features a 1/2"-13 UNC thread with a Class 3A fit for high precision. The shoulder diameter tolerance is -0.001" to 0.001", and shoulder length tolerance is -0.005" to 0.005". It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.