S-90841A160 4-40 x 3/4" ASME B18.3 High-Vacuum Cleaned-and-Bagged Vented Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional tensile strength rated at 70,000 psi for reliable performance in high-stress applications
• Precision Class 3A thread fit ensures secure fastening and vibration resistance in critical assemblies
• High vacuum compatibility with vented design prevents pressure buildup in sealed systems
• Enhanced durability with Rockwell B70 hardness for long service life and reduced wear
• Standard hex drive compatibility allows for easy installation with common 3/32" tools
• Comprehensive regulatory compliance meets ASME B18.3, RoHS 3, and REACH standards

Professional Applications & Engineering Value

These socket head cap screws with 4-40 UNC coarse threads provide critical solutions for precision engineering applications where reliability is paramount. The 18-8 stainless steel composition offers excellent corrosion resistance while maintaining 70,000 psi tensile strength, making them suitable for aerospace, automotive, and industrial machinery components. The vented design with 0.036" vent diameter prevents pressure differential issues in high vacuum environments, while the Class 3A thread fit ensures precise engagement and vibration resistance in dynamic applications. The hex drive socket design allows for high torque application in confined spaces, providing superior clamping force for critical joints.

Specification Summary & Compliance

This socket head cap screw features precise 4-40 UNC coarse threads with Class 3A fit for superior thread engagement and dimensional accuracy. Manufactured to ASME B18.3 specifications with Rockwell B70 hardness and 70,000 psi tensile strength. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.