S-94323A845 1/4"-20 x 1 1/2" Thumb Screws

Thumb Screws

0789FA00023 Thumb Screws
0789FA00023 Thumb Screws

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

Part No.
Part No. 0789FA00023
Equivalent to mcmaster :
94323A845

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 1/2"
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

  • Tool-free manual operation with knurled thumb head for secure grip and quick adjustments without slipping
  • Excellent corrosion resistance due to nylon plastic construction, ideal for humid or chemical environments
  • Wide temperature tolerance from -40°F to 185°F for reliable performance in varying industrial conditions
  • High tensile strength of 11,000 psi ensures durable fastening under mechanical stress
  • Coarse UNC threads with Class 2A fit provide easy engagement and secure holding in various materials
  • Fully threaded design allows for maximum adjustability and consistent clamping force along the entire length
  • RoHS 3 compliance guarantees environmentally safe materials for regulated industries

Professional Applications & Engineering Value

These nylon plastic thumb screws deliver exceptional value in applications requiring frequent adjustments and corrosion resistance. The knurled head ensures a firm grip even with gloves, reducing installation time in assembly lines, electronic enclosures, and machinery panels. Made from durable nylon material, they avoid galvanic corrosion when used with dissimilar metals and withstand temperatures from -40°F to 185°F, making them suitable for outdoor equipment, automotive components, and HVAC systems. The fully threaded 1/4"-20 UNC coarse thread design ensures quick fastening and reliable hold in plastic, wood, or soft metal substrates, streamlining maintenance and reducing tool dependency.

Specification Summary & Compliance

This thumb screw features a 1/4"-20 UNC coarse thread with Class 2A thread fit for standard tolerance and easy assembly. It is fully threaded with a right-hand thread direction and complies with RoHS 3 (2015/863/EU) regulations, ensuring lead-free and hazardous substance-free manufacturing. The specifications include a round, raised head profile with knurling for enhanced grip, supporting reliable performance in industrial fastening applications.

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