S-91746A926 4-48 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 for long-lasting performance in demanding environments
- Excellent hand-tightening capability through knurled round head design for secure grip without tools
- High mechanical strength with 80,000 psi tensile strength and Rockwell B83 hardness for reliable load-bearing applications
- Precision thread engagement with Class 2A fit and UNF fine threads ensuring secure fastening and vibration resistance
- Full threading along 1" length provides maximum adjustment flexibility and consistent holding power
- Environmental compliance assurance with RoHS 3 and REACH standards for safe use across regulated industries
- Dual drive options combining thumb operation with slotted drive for versatile installation methods
Professional Applications & Engineering Value
This 4-48 UNF thumb screw delivers exceptional engineering value through its 18-8 stainless steel composition, providing optimal corrosion resistance for industrial equipment, electronic enclosures, and machinery requiring frequent adjustments. The knurled head texture and round narrow profile enable quick hand-tightening in confined spaces, eliminating tool dependency while maintaining secure fastening. The fine UNF threading with Class 2A fit ensures precise engagement in tapped holes, preventing loosening under vibration—critical for precision instruments and assembly fixtures. The fully threaded design accommodates varying material thicknesses, making it ideal for prototyping, maintenance panels, and adjustable components where reliability and ease of use are paramount.
Specification Summary & Compliance
This thumb screw maintains Class 2A thread fit tolerance per UNF standards with precise 4-48 thread specifications. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring material safety and regulatory adherence. The inch-system dimensional accuracy includes 0.25" head diameter, 1/2" head height, and 1" fully threaded length, providing consistent performance across industrial applications requiring reliable manual fastening solutions.
