S-98816A243 8-32 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
- Enhanced grip and torque application with knurled round head design for secure manual operation without tools
- Superior corrosion resistance and durability thanks to high-quality brass construction with Rockwell B78 hardness
- Reliable load-bearing capacity with 50,000 psi tensile strength for demanding industrial applications
- Precise and secure fastening ensured by Class 2A thread fit and UNC coarse threading
- Quick and easy installation with fully threaded design and right-hand thread direction
- Compliance with environmental standards through RoHS 3 compliance for safe use in regulated industries
- Optimized ergonomic handling with raised head profile providing comfortable thumb pressure distribution
Professional Applications & Engineering Value
This 8-32 UNC brass thumb screw delivers exceptional performance in industrial settings where frequent adjustments and tool-free operation are critical. The knurled head texture ensures maximum grip even with oily hands or gloves, reducing slippage in high-vibration environments. Made from RoHS compliant brass, it resists corrosion in humid or chemical-exposed applications like electrical enclosures, machinery panels, and laboratory equipment. The fully threaded coarse spacing and Class 2A thread fit provide rapid installation with consistent clamping force, while the 50,000 psi tensile strength supports heavy-duty use in assembly jigs, automotive components, and precision instruments without stripping or deformation.
Specification Summary & Compliance
This thumb screw features a Class 2A thread fit with UNC coarse threading (8-32 size, 0.164" diameter) and right-hand direction for standardized compatibility. Manufacturing adheres to precise dimensional tolerances for head diameter (1/2"), length (5/8"), and collar specifications. The product is RoHS 3 (2015/863/EU) compliant under exemption 6(c) for lead in copper alloys, ensuring environmental regulation adherence for global industrial supply chains.
