S-90298A549 10-24 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Corrosion Resistance: Crafted from 18-8 Stainless Steel with a passivated finish for superior durability in harsh environments, reducing maintenance and replacement costs.
• Superior Alignment and Bearing Surface: Features a precision-ground 2 1/4" shoulder with a tight ±0.005" length tolerance for accurate component positioning and reduced wear.
• High-Strength Fastening: Offers a robust 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance in demanding, high-stress applications.
• Precision Thread Fit for Secure Assembly: Class 3A thread fit ensures tighter tolerances and a more secure, vibration-resistant connection compared to standard fits.
• Easy and Secure Installation: The hex socket (1/8" drive) and knurled head provide excellent grip and torque transmission, facilitating quick assembly and disassembly.
• Guaranteed Interchangeability: Manufactured in compliance with ASME B18.3 specifications, ensuring consistent quality and dimensional accuracy for seamless integration.
• Safe for Regulated Industries: Compliant with RoHS 3 and REACH standards, making it suitable for use in electronics and other sensitive applications.

Professional Applications & Engineering Value

This 10-24 UNC shoulder screw is engineered to solve critical alignment and pivot point challenges in industrial machinery. The long, precision 2 1/4" shoulder acts as a reliable axle or dowel, ensuring components like gears, pulleys, and linkages rotate or align without misalignment or binding. The 18-8 Stainless Steel construction and passivated finish provide excellent resistance to rust and corrosion, which is vital for equipment in wash-down environments or outdoor use. The Class 3A thread fit and coarse UNC thread offer a strong, vibration-resistant hold, making it ideal for assemblies subject to dynamic loads. Its combination of a knurled head for grip and a hex socket drive ensures secure installation in tight spaces, delivering long-term reliability and reducing machine downtime.

Specification Summary & Compliance

This shoulder screw features a 10-24 UNC thread with a precision Class 3A thread fit and a shoulder diameter held to a tight -0.001" to 0.001" tolerance. It is manufactured to meet the dimensional and mechanical specifications of ASME B18.3. The product is confirmed to be compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.