S-94567A540 1/4"-20 x 5/8" 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 grip and handling with a knurled round head and flared collar design for secure tool-free operation in tight spaces
- Excellent strength-to-weight ratio from 6061 aluminum construction, offering 40,000 psi tensile strength without adding bulk
- Precise and reliable threading with UNC coarse spacing and Class 2A fit for consistent engagement and reduced cross-threading risks
- Enhanced durability with Rockwell B60 hardness, resisting wear and deformation in frequent adjustment applications
- Full-length threading provides maximum fastening depth and versatility across various material thicknesses
- Compliant with industry regulations including RoHS 3 and REACH, ensuring safe use in regulated environments
- Right-hand thread direction ensures intuitive installation and compatibility with standard assembly practices
Professional Applications & Engineering Value
This 1/4"-20 knurled thumb screw delivers exceptional performance in industrial settings where quick, tool-free adjustments are critical. The 6061 aluminum body combines lightweight properties with 40,000 psi tensile strength, making it ideal for applications requiring repeated access without compromising structural integrity—such as panel fastening, electronic enclosures, and machinery guards. The knurled head texture and flared collar prevent slippage, even with gloved hands, while the UNC coarse threads and Class 2A fit ensure rapid installation and resistance to vibration loosening. Fully threaded for maximum grip depth, this component solves common issues of stripped threads and misalignment in high-use assembly lines.
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) compliance under exemption 6(b)-II and is REACH (EC 1907/2006) compliant, ensuring environmental and safety standards are upheld. Specifications include a 1/4"-20 thread size, 5/8" length, and fully threaded coarse spacing, manufactured to precise tolerances for reliable performance in industrial fastening applications.
