S-90732A380 1/4"-20 x 5/8" Thumb Screws

Key Features & Benefits at a Glance

• Tool-free manual operation with thumb head design for quick adjustments without requiring wrenches or drivers
• Superior corrosion resistance through black-oxide steel coating that protects against rust in industrial environments
• Exceptional load-bearing capacity with 70,000 psi tensile strength ensuring reliable performance under heavy stress
• Consistent thread engagement through Class 2A thread fit providing precise, vibration-resistant fastening
• Quick installation with UNC coarse threads that enable faster assembly compared to fine-thread alternatives
• Maximum grip surface from the external hex drive design allowing additional tool application when needed
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use across various industries

Professional Applications & Engineering Value

These black-oxide steel thumb screws deliver exceptional value in industrial settings where frequent adjustments and reliable fastening are critical. The fully threaded UNC coarse thread design ensures maximum thread engagement across the entire length, providing superior holding power in applications subject to vibration and dynamic loads. The Rockwell B84 hardness rating combined with the protective black-oxide finish creates a durable fastener resistant to wear and environmental degradation. Engineering teams specify these 1/4"-20 thumb screws for equipment access panels, machinery adjustments, and production jigs where tool-free operation speeds maintenance cycles while maintaining 70,000 psi tensile strength for demanding applications. The external hex drive offers flexibility for both manual operation and tool-assisted tightening when higher torque requirements exist.

Specification Summary & Compliance

Manufactured to precise Class 2A thread fit standards with UNC coarse threads (1/4"-20) in right-hand direction. These fully threaded thumb screws feature a 1/2" head width and 3/8" head height with external hex drive configuration. The black-oxide steel construction delivers consistent performance with Rockwell B84 hardness and 70,000 psi tensile strength. Compliant with RoHS 3 (2015/863/EU) under exemption 6(a)-I and REACH (EC 1907/2006) standards, ensuring environmental regulatory adherence for industrial applications.