S-90179A540 1/4"-20 x 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
- Enhanced manual operation with spade head design providing superior grip and torque application without tools
- Exceptional durability through high-strength steel construction with Rockwell B55 hardness rating
- Reliable fastening performance with 40,000 psi tensile strength for demanding industrial applications
- Quick installation and removal thanks to UNC coarse thread spacing and Class 2A thread fit
- Secure seating and stability from integrated flange design that distributes load effectively
- Complete thread engagement with fully threaded shank for maximum holding power along entire length
- Environmental compliance meeting RoHS 3 standards for safe use in regulated industries
Professional Applications & Engineering Value
This 1/4"-20 thumb screw delivers exceptional engineering value for industrial applications requiring frequent adjustments or tool-free maintenance. The steel construction with Rockwell B55 hardness ensures resistance to deformation under repeated use, while the 40,000 psi tensile strength provides reliable performance in vibration-prone environments. The spade head design with 33/64" width offers superior manual grip for quick installation and removal, eliminating the need for specialized tools in tight spaces. The flanged feature prevents over-tightening and provides better load distribution, making these industrial thumb screws ideal for access panels, machinery guards, electronic enclosures, and equipment requiring regular service. The fully threaded UNC coarse spacing ensures rapid engagement and disengagement, significantly reducing maintenance downtime in production environments.
Specification Summary & Compliance
This thumb screw features precision Class 2A thread fit with UNC coarse thread spacing (1/4"-20) and right-hand thread direction. Manufactured to exacting standards with fully threaded design and dimensions including 3/4" length, 0.25" thread diameter, and 0.438" flange diameter. The product is RoHS 3 (2015/863/EU) Compliant, ensuring environmental responsibility and regulatory adherence for industrial applications worldwide.
