S-90017A633 3/8"-16 x 1 1/2" Thumb Screws
Thumb Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior manual torque control with a large 1" rectangular head for maximum grip and easy hand-tightening without tools
- Enhanced corrosion resistance from the black-oxide steel finish, extending service life in industrial environments
- Reliable coarse thread engagement with UNC 3/8"-16 threading for quick assembly and reduced cross-threading risks
- Versatile partial threading design allowing flexible positioning and secure clamping across various material thicknesses
- Precision Class 2A thread fit ensuring consistent performance and interchangeability in standardized assemblies
- Right-hand thread direction for intuitive installation following conventional tightening practices
- Environmentally compliant construction meeting RoHS 3 standards for safe use in regulated industries
Professional Applications & Engineering Value
Engineered for demanding industrial settings, this black-oxide steel thumb screw combines material durability with user-centric design. The rectangular head provides exceptional leverage for high-torque manual adjustments, eliminating the need for tools in maintenance-heavy applications like machinery access panels, electrical enclosures, and prototyping jigs. The coarse UNC threads ensure rapid installation in soft materials or worn threads, while the partial threading allows precise adjustment where full-length threads are unnecessary. Its RoHS 3 compliance makes it suitable for electronics, automotive, and aerospace assemblies where regulatory adherence is critical. The black-oxide surface resists oxidation in humid environments, reducing replacement frequency and downtime.
Specification Summary & Compliance
This thumb screw adheres to UNC 3/8"-16 coarse thread standards with a Class 2A thread fit for consistent dimensional accuracy. The 1 1/2" length and partial threading (1 1/4" thread length) provide versatile fastening capabilities. Manufacturing complies with RoHS 3 (2015/863/EU) regulations, ensuring restriction of hazardous substances. The inch-system measurements maintain compatibility with North American industrial specifications.
