S-90017A553 1/4"-20 x 1 3/4" 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
- Effortless manual tightening and loosening with a rectangular thumb head (3/4" width, 5/8" height) for superior grip without tools.
- Enhanced durability and corrosion resistance thanks to the black-oxide steel finish, extending service life in harsh environments.
- Reliable, high-strength performance with a tensile strength of 70,000 psi and Rockwell B84 hardness for demanding applications.
- Quick and secure coarse thread engagement via 1/4"-20 UNC right-hand threads, reducing installation time.
- Precise thread fit and interchangeability ensured by Class 2A thread standards for consistent quality.
- Versatile partial threading design allowing for adjustable clamping and secure fastening in various setups.
- Compliance with strict environmental regulations, including RoHS 3 and REACH, for safe and sustainable use.
Professional Applications & Engineering Value
This black-oxide steel thumb screw is engineered to address common industrial challenges, such as frequent adjustments and exposure to corrosive elements. The UNC coarse thread and right-hand threading enable rapid assembly and disassembly in equipment like machinery panels, electronic enclosures, and prototyping fixtures, where tool-free access is critical. Its partially threaded shank provides flexibility for precise positioning, while the rectangular head offers a comfortable, non-slip surface for manual operation. With a robust 70,000 psi tensile strength and corrosion-resistant coating, it ensures long-term reliability in heavy-duty settings, reducing maintenance downtime and improving operational efficiency for engineers and technicians.
Specification Summary & Compliance
This thumb screw adheres to Class 2A thread fit and UNC coarse thread standards for dimensional accuracy, with a thread size of 1/4"-20 and a length of 1 3/4". It is manufactured from high-strength steel and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.
