S-91746A748 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
- Superior corrosion resistance with 18-8 stainless steel construction, ideal for humid or harsh industrial environments
- Enhanced grip and torque application thanks to the fully knurled round head design for secure hand-tightening without tools
- Reliable mechanical performance with Rockwell B85 hardness and 80,000 psi tensile strength for heavy-duty applications
- Precise thread engagement ensured by Class 2A thread fit and UNC coarse threading for quick assembly and vibration resistance
- Space-saving low-profile head allows installation in tight spaces while maintaining easy manual operation
- Versatile partial threading provides secure fastening on a range of material thicknesses without compromising strength
- Compliance with global regulations including RoHS 3 and REACH, ensuring safe use in regulated industries
Professional Applications & Engineering Value
Engineered for demanding industrial applications, this 1/4-20 UNC thumb screw delivers exceptional value in machinery assembly, electronic enclosures, and access panels where frequent adjustments are required. The 18-8 stainless steel material provides excellent corrosion resistance, eliminating rust concerns in moist or chemical-exposed environments. Its knurled low-profile head offers superior finger grip, reducing installation time and eliminating the need for tools in maintenance-heavy operations. The coarse UNC threading and Class 2A thread fit ensure reliable engagement in various materials, while the partial threading design prevents cross-threading and provides optimal clamping force. Ideal for OEM equipment, industrial controls, and instrumentation where manual fastening solutions must balance durability with user convenience.
Specification Summary & Compliance
This thumb screw features precise 1/4"-20 UNC coarse threads with Class 2A thread fit for standard industrial applications. Manufacturing adheres to inch system specifications with a total length of 1" and partial threading of 13/16". The component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance across global markets.
