S-93465A103 4-40 x 3/16" Brass Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to brass construction, ideal for harsh environments and extended service life
• High-strength performance with a 50,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing applications
• Precise, secure fastening ensured by Class 3A thread fit, minimizing the risk of loosening under vibration
• Easy installation and removal with a standard hex socket (3/32" drive) and right-hand coarse (UNC) threading
• Full thread engagement along the entire 3/16" length for maximum grip and distribution of stress
• Compliance with stringent regulations including RoHS 3 and REACH, ensuring safety and environmental responsibility
• Durable, non-sparking material making it suitable for use in potentially explosive or electrically sensitive areas

Professional Applications & Engineering Value

These 4-40 UNC Socket Head Cap Screws in brass are engineered to address common industrial challenges such as corrosion, vibration-induced loosening, and the need for non-magnetic, non-sparking components. The coarse thread design allows for quicker assembly and better performance in softer materials or where debris is present. With a Class 3A thread fit, they provide tighter tolerances than standard fits, reducing backlash and improving mechanical stability in precision equipment, electronics enclosures, and marine applications. The hex drive and socket head profile offer a compact, flush installation, ideal for space-constrained assemblies while maintaining high torque capability. Their inherent corrosion resistance eliminates the need for additional plating, making them a cost-effective solution for long-term reliability in demanding environments.

Specification Summary & Compliance

This socket head cap screw features a 4-40 UNC coarse thread with a Class 3A fit for high precision. Dimensions include a 3/16" length, 0.183" head diameter, and 3/32" hex drive. Manufactured from brass with a tensile strength of 50,000 psi and Rockwell B55 hardness, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial use.