S-98816A266 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
- Superior hand-tightening capability with a 5/8" diameter knurled round head for excellent grip without tools
- Enhanced durability and corrosion resistance from solid brass construction with Rockwell B78 hardness
- Reliable load-bearing performance with 50,000 psi tensile strength for demanding applications
- Quick and secure fastening through fully threaded 1/4"-20 UNC coarse thread design
- Precise thread engagement ensured by Class 2A thread fit for consistent assembly quality
- Regulatory compliance assurance with RoHS 3 (2015/863/EU) exemption for safe use in industrial environments
- Stable seating and alignment provided by integrated 1/2" diameter collar with 1/8" height
Professional Applications & Engineering Value
This 1/4"-20 brass thumb screw delivers exceptional value in applications requiring frequent adjustments or tool-free operation. The knurled round head with raised profile ensures positive grip even with gloved hands or in oily conditions, reducing installation time in maintenance panels, electronic enclosures, and machinery access points. The fully threaded UNC coarse pattern provides rapid engagement and high resistance to vibration loosening, while the brass material offers excellent corrosion resistance in humid or chemical environments. With its Class 2A thread fit and integrated collar, this thumb screw maintains precise alignment and prevents overtightening damage, making it ideal for precision instruments, electrical equipment, and industrial controls where reliability and repeated access are critical.
Specification Summary & Compliance
This thumb screw features precise 1/4"-20 UNC coarse threads with Class 2A thread fit for consistent dimensional accuracy. The manufacturing complies with standard thread specifications for reliable performance. The product is RoHS 3 (2015/863/EU) compliant with exemption 6(c) for lead in copper alloy, ensuring environmental regulation adherence while maintaining the material properties required for industrial applications.
