S-90772A542 1/4"-20 x 1" Thumb Screws

Key Features & Benefits at a Glance

• Easy manual installation and removal with a spade-shaped thumb head for tool-free operation in tight spaces
• Superior corrosion resistance thanks to zinc-plated steel construction, extending service life in harsh environments
• Non-marring surface protection from the soft nylon tip, preventing damage to sensitive components during fastening
• Reliable coarse threading (UNC 1/4"-20) ensures quick engagement and reduced cross-threading risks in industrial assemblies
• High tensile strength of 40,000 psi provides robust clamping force for demanding applications
• Consistent thread fit (Class 2A) guarantees precise mating with nuts and tapped holes, minimizing assembly errors
• Full threading along the 1" length allows for adjustable positioning and secure fastening at any point

Professional Applications & Engineering Value

This 1/4"-20 thumb screw is engineered to address common industrial challenges, such as frequent adjustments and component protection. The zinc-plated steel body offers excellent durability against corrosion, while the soft nylon tip eliminates scratching on finished surfaces—ideal for electronics, machinery panels, and fixtures. With coarse UNC threads and Class 2A fit, it ensures rapid installation and reliable performance in vibration-prone environments. Its spade head design enables effortless hand-tightening, reducing tool dependency and downtime in maintenance-heavy sectors like manufacturing and automation.

Specification Summary & Compliance

This thumb screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety. Manufactured with fully threaded 1/4"-20 coarse spacing, it supports industrial specifications for tensile strength (40,000 psi) and hardness (Rockwell B71).