S-91746A969 8-40 x 1" Thumb Screws
Thumb Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
- Exceptional grip and easy hand-tightening thanks to the fully knurled round head, reducing tool dependency and speeding up assembly.
- High mechanical strength with 80,000 psi tensile strength and Rockwell B83 hardness, ensuring dependable performance under load.
- Precise thread engagement with 8-40 extra fine thread and Class 2A fit, minimizing backlash and providing secure fastening in fine-pitch applications.
- Full threading along the 1" length offers maximum adjustability and holding power throughout the entire fastener.
- Compliance with RoHS 3 and REACH environmental regulations, ensuring safety and suitability for regulated industries.
- Versatile right-hand UNS thread compatible with standard inch-system components, facilitating easy integration.
Professional Applications & Engineering Value
This 18-8 Stainless Steel Thumb Screw is engineered to address common industrial challenges such as frequent adjustments, corrosion in moist or chemical environments, and the need for tool-free operation. The knurled head provides a non-slip surface, enabling quick manual tightening and loosening in confined spaces or on production lines where speed is critical. Its extra fine 8-40 thread and Class 2A fit ensure precise alignment and vibration resistance in delicate assemblies, such as electronic enclosures, optical devices, and precision instruments. Made from durable stainless steel, it resists rust and wear, reducing maintenance costs and downtime. Fully threaded and with a narrow round-head profile, it is ideal for applications requiring reliable, repeatable fastening without compromising on space or performance.
Specification Summary & Compliance
This thumb screw adheres to UNS thread standards with an 8-40 extra fine thread and Class 2A thread fit for consistent dimensional accuracy and interchangeability. It is manufactured to deliver 80,000 psi tensile strength and Rockwell B83 hardness, ensuring mechanical reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in environmentally conscious and regulated industries.
