S-95966A646 4-40 x 1" Captive Panel Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh industrial environments.
• Enhanced panel retention due to the partially threaded design and Class 3A thread fit, preventing loosening under vibration.
• High tensile strength of 70,000 psi ensures reliable fastening under significant mechanical stress.
• Secure and non-slip installation with a knurled head texture and 3/32" hex drive for precise torque application.
• Broad compatibility with UNC coarse threads and right-hand direction, fitting standard industrial panel assemblies.
• Consistent dimensional accuracy with a length tolerance of -0.03" to 0" for uniform assembly across multiple panels.
• Environmental and regulatory compliance with RoHS 3 and REACH, ensuring safe and sustainable use.

Professional Applications & Engineering Value

This 4-40 UNC captive panel screw is engineered to address common challenges in industrial panel fastening, such as vibration-induced loosening and corrosion. The 18-8 stainless steel material provides excellent durability against moisture and chemicals, while the Class 3A thread fit and coarse pitch ensure quick and secure installation in captive panel assemblies. The partially threaded shank and knurled head enhance grip and prevent back-out, making it ideal for electronics enclosures, machinery panels, and communication devices where reliability is critical. Its 70,000 psi tensile strength supports heavy-duty applications, reducing maintenance needs and downtime.

Specification Summary & Compliance

This screw adheres to UNC thread standards with a Class 3A thread fit for precise engagement and a length tolerance of -0.03" to 0". It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for global industrial use.