S-91746A026 4-48 x 1" 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 manual grip with knurled round head for easy, tool-free tightening and loosening in confined spaces
- Exceptional corrosion resistance from 18-8 stainless steel construction, ideal for harsh industrial environments
- High mechanical strength with 80,000 psi tensile strength and Rockwell B83 hardness for reliable, long-lasting performance
- Precision thread engagement with Class 2A fine UNF threads ensuring secure, vibration-resistant fastening
- Full-length threading provides maximum adjustment flexibility and consistent holding power along the entire 1" length
- Compliance with environmental standards including RoHS 3 and REACH for safe use in regulated industries
- Narrow profile design allows installation in tight spaces while maintaining excellent torque application
Professional Applications & Engineering Value
This 4-48 UNF thumb screw delivers exceptional value in applications requiring frequent adjustments or tool-free operation. The 18-8 stainless steel construction provides excellent corrosion resistance, making it suitable for electronic enclosures, medical devices, and laboratory equipment where moisture or chemicals are present. The knurled round head with narrow profile ensures positive grip even with gloved hands, while the fine thread spacing and Class 2A thread fit maintain precise alignment and prevent loosening under vibration. The fully threaded design allows for consistent clamping force across the entire 1" length, solving common challenges in assembly lines and maintenance scenarios where quick, reliable fastening is critical.
Specification Summary & Compliance
This thumb screw features precision 4-48 UNF threads with Class 2A fit for consistent engagement and reliable performance. The manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. The right-hand thread direction and fully threaded design provide standard operation with maximum utility in precision assembly applications.
