S-91185A915 1/4"-20 x 3/8" Thumb Screws

Key Features & Benefits at a Glance

• Effortless hand-tightening with a two-arm black Acetal Plastic head for quick assembly and disassembly without tools
• Superior corrosion resistance from 18-8 Stainless Steel construction, ideal for harsh industrial environments
• Reliable thread engagement with Class 3A UNC coarse threading, ensuring secure fastening and vibration resistance
• Wide temperature tolerance (32° to 180° F) for stable performance in varying operational conditions
• Full threading design provides consistent grip along the entire length, maximizing holding power
• Compliance with environmental standards including RoHS 3 and REACH, supporting sustainable and safe manufacturing practices
• Durable plastic head made of Acetal, offering excellent wear resistance and electrical insulation properties

Professional Applications & Engineering Value

This 1/4"-20 thumb screw combines 18-8 Stainless Steel with a black Acetal Plastic head to address common industrial challenges like frequent adjustments and exposure to moisture or chemicals. The fully threaded design and UNC coarse thread ensure rapid installation and high tensile strength, reducing assembly time in equipment maintenance, electronic enclosures, and machinery panels. Its Class 3A thread fit guarantees precise alignment, minimizing cross-threading risks, while the two-arm head allows for secure hand-tightening in tight spaces. Ideal for applications requiring corrosion-resistant and RoHS compliant components, this screw enhances reliability in automotive, aerospace, and consumer electronics sectors.

Specification Summary & Compliance

This thumb screw adheres to UNC coarse thread standards with a Class 3A thread fit for high precision and durability. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met. The specifications include a thread size of 1/4"-20, length of 3/8", and head dimensions of 5/16" height and 1 1/4" width, supporting consistent performance in industrial assemblies.