S-91746A896 1/4"-20 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
- Effortless hand-tightening and adjustment with a knurled round head for superior grip, even in oily or gloved conditions.
- Exceptional corrosion resistance thanks to 18-8 Stainless Steel construction, ensuring long-term reliability in harsh environments.
- High mechanical strength and durability with a tensile strength of 80,000 psi and Rockwell B85 hardness to withstand demanding applications.
- Quick and easy installation with coarse 1/4"-20 UNC threads and a Class 2A fit for smooth, reliable engagement without binding.
- Maximum holding power and versatility from a fully threaded 1-inch length, providing consistent fastening along the entire shank.
- Compliance with global environmental standards, being RoHS 3 and REACH compliant for use in regulated industries.
- Tool-assisted option when needed with a slotted drive, offering flexibility for final tightening with a standard screwdriver.
Professional Applications & Engineering Value
This 18-8 stainless steel thumb screw is engineered to solve common industrial challenges where frequent adjustments or tool-less access is critical. The knurled head provides a secure, non-slip grip, reducing assembly time and improving operator safety in applications like panel fastening, machinery guards, and electronic enclosures. Its corrosion-resistant properties make it ideal for use in moist or chemically aggressive environments, preventing thread seizure and extending service life. The combination of coarse UNC threads and a Class 2A fit ensures rapid installation with minimal cross-threading risk, while the fully threaded design offers uniform clamping force. This makes it a reliable choice for maintenance, prototyping, and production lines where durability and ease of use are paramount.
Specification Summary & Compliance
This thumb screw features a 1/4"-20 UNC coarse thread with a Class 2A tolerance for consistent, reliable fits. It is manufactured from 18-8 Stainless Steel, fully threaded, and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial use.
