S-94323A843 1/4"-20 x 1 1/4" Thumb Screws

Thumb Screws

0789FA00022 Thumb Screws
0789FA00022 Thumb Screws

Image may differ from product. See technical specification for details.

Part No.
Part No. 0789FA00022
Equivalent to mcmaster :
94323A843

Basic Information

System of Measurement Inch

Head Parameters

Head Type Thumb
Thumb Screw Head Shape Round
Round-Head Thumb Screw Profile Raised
Head Diameter 35/64"
Head Height 5/32"
Head Texture Knurled

Dimensions

Length 1 1/4"
Collar Diameter 27/64"
Collar Height 7/32"

Thread Parameters

Thread Type UNC
Thread Size 1/4"-20
Thread Diameter 0.25"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 2A
Threading Fully Threaded

Material & Strength

Material Nylon Plastic
Hardness Not Rated
Tensile Strength 11000 psi

Temperature & Environment

Temperature Range -40° to 185° F
RoHS Compliant
Technical Drawings No drawings available at the moment, will be launched soon
In Stock
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Key Features & Benefits at a Glance

  • Superior hand-tightening capability with knurled round head design for excellent grip without tools
  • Durable nylon construction provides corrosion resistance and electrical insulation properties
  • Wide temperature tolerance from -40° to 185°F for reliable performance in various environments
  • 11,000 psi tensile strength ensures secure fastening in demanding applications
  • Precision UNC coarse threading with Class 2A fit enables quick installation and removal
  • Fully threaded design offers maximum engagement and holding power
  • RoHS 3 compliance ensures environmental safety and regulatory adherence

Professional Applications & Engineering Value

This 1/4"-20 nylon thumb screw delivers exceptional value in applications requiring frequent adjustments or tool-less operation. The knurled round head with raised profile provides superior tactile grip, reducing hand fatigue during repeated use while the nylon material eliminates galvanic corrosion concerns when mating with dissimilar metals. The UNC coarse thread configuration ensures rapid installation in plastic enclosures, electronic chassis, and assembly fixtures. With temperature resistance spanning -40° to 185°F, this thumb screw maintains dimensional stability across harsh environments, making it ideal for electronic equipment, industrial controls, and automotive applications where electrical insulation and chemical resistance are critical.

Specification Summary & Compliance

This thumb screw features precision 1/4"-20 UNC coarse threads with Class 2A thread fit for consistent engagement and reliable performance. Manufactured to exacting dimensional standards with 35/64" head diameter and 1 1/4" length, the component ensures proper clearance and sufficient thread engagement. The product is fully compliant with RoHS 3 (2015/863/EU) regulations, containing no restricted hazardous substances, making it suitable for global markets and environmentally conscious applications.

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