S-90292A112 1/4"-20 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 17-4 PH Stainless Steel construction, ideal for harsh industrial environments.
• Exceptional mechanical strength offering 130,000 psi tensile and 65,000 psi shear strength for high-load applications.
• Precise Class 3A thread fit ensures reliable engagement and vibration resistance in assemblies.
• Knurled head texture provides enhanced grip for easier manual installation and adjustment.
• Standard hex socket drive allows for straightforward installation with common tools, reducing assembly time.
• Durable Rockwell C28 hardness maintains structural integrity under repeated stress and wear.
• Compliance with RoHS and REACH ensures environmental safety and regulatory acceptance in global markets.

Professional Applications & Engineering Value

This 17-4 PH Stainless Steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. Its 1/4-20 UNC coarse thread and Class 3A fit provide secure fastening in high-vibration environments, reducing the risk of loosening. The knurled head enhances handling during installation, while the high tensile and shear strength supports demanding applications like robotics, aerospace components, and industrial conveyors. With excellent corrosion resistance, it ensures long-term reliability in moist or chemically aggressive settings, minimizing maintenance downtime and replacement costs.

Specification Summary & Compliance

This shoulder screw features a 1/4-20 UNC thread with Class 3A fit for precise tolerance, a shoulder diameter of 5/16" with tight tolerance control, and a 5/32" hex drive for standard tool compatibility. It is manufactured in accordance with ASME B18.3 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets industry standards for safety and environmental responsibility.