S-90772A537 1/4"-20 x 1/2" Thumb Screws
Thumb Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Easy manual installation and removal with the spade-shaped thumb head design, eliminating the need for tools in frequent adjustments.
- Superior corrosion resistance provided by the zinc-plated steel material, ensuring long-term reliability in harsh industrial environments.
- Scratch-free and surface-safe fastening thanks to the soft nylon tip, ideal for protecting sensitive materials and finished surfaces.
- High tensile strength of 40,000 psi delivers robust holding power for demanding applications without failure.
- Reliable coarse UNC threading with Class 2A fit ensures quick assembly and secure fastening in various materials.
- Full threading along the 1/2" length allows for adjustable depth and consistent grip across the entire fastener.
- Compliance with RoHS 3 and REACH regulations guarantees environmental safety and broad acceptability in global markets.
Professional Applications & Engineering Value
This 1/4"-20 thumb screw is engineered to address common industrial challenges such as rapid assembly, component protection, and corrosion management. The zinc-plated steel construction offers excellent durability against oxidation, while the soft nylon tip prevents marring on delicate surfaces like electronics, machinery panels, and automotive parts. With a coarse UNC thread and Class 2A fit, it ensures quick, secure engagement in wood, plastic, or metal, reducing installation time and minimizing cross-threading risks. Ideal for applications requiring frequent adjustments—such as access panels, clamps, and fixtures—this thumb screw combines high tensile strength and Rockwell B71 hardness for reliable performance in maintenance, manufacturing, and OEM equipment.
Specification Summary & Compliance
This product features precise UNC coarse threads with a Class 2A thread fit, ensuring standard dimensional accuracy and interchangeability. It is fully threaded and right-hand oriented for consistent performance. Manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets stringent environmental and safety standards for industrial use.
