S-94465A415 4-40 x 1/4" Captive Panel Screws

Key Features & Benefits at a Glance

• Enhanced grip and torque application with a knurled thumb head and Phillips No. 2 drive, reducing tool slippage and speeding up manual assembly.
• Superior corrosion resistance using 430 stainless steel for the head and 18-8 stainless steel for the body, ensuring longevity in harsh industrial environments.
• Secure and reliable panel fastening with coarse UNC threads, designed for panels with 0.219" hole diameter and minimum 0.036" thickness to prevent loosening under vibration.
• Easy installation and removal thanks to the round thumb head design and right-hand thread direction, ideal for frequent access applications like electronic enclosures.
• Durable construction from high-grade stainless steels, providing excellent strength and wear resistance for repeated use in captive panel assemblies.
• Compliance with environmental standards by being RoHS 3 (2015/863/EU) compliant, meeting global regulatory requirements for hazardous substance restrictions.

Professional Applications & Engineering Value

This 4-40 UNC thumb screw is engineered to address common challenges in industrial and electronic panel fastening, such as vibration-induced loosening and corrosion. The knurled head and Phillips drive offer dual gripping options for secure manual tightening without specialized tools, while the coarse thread design ensures quick engagement and stability in thin panels. Made from 430 stainless steel and 18-8 stainless steel, it provides robust resistance to rust and wear, making it ideal for applications in electronics, telecommunications, and machinery where captive panel screws must withstand frequent adjustments. Its precise dimensions, including a 0.281" head diameter and 1/4" length, guarantee a perfect fit for standard panel holes, enhancing assembly efficiency and reducing maintenance downtime.

Specification Summary & Compliance

This captive panel screw adheres to UNC thread standards with a 4-40 size and coarse spacing, ensuring compatibility with common industrial specifications. It meets Class 2A tolerance for reliable fit and function, and is fully RoHS 3 (2015/863/EU) compliant, confirming adherence to environmental regulations for hazardous substances. The design incorporates a threaded captive screw type for secure panel retention, with materials and construction following industry best practices for durability and performance.