S-94323A922 5/16"-18 x 1" Thumb Screws

Thumb Screws

0789FA00025 Thumb Screws
0789FA00025 Thumb Screws

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

Part No.
Part No. 0789FA00025
Equivalent to mcmaster :
94323A922

Basic Information

System of Measurement Inch

Head Parameters

Head Type Thumb
Thumb Screw Head Shape Round
Round-Head Thumb Screw Profile Raised
Head Diameter 39/64"
Head Height 11/64"
Head Texture Knurled

Dimensions

Length 1"
Collar Diameter 1/2"
Collar Height 7/32"

Thread Parameters

Thread Type UNC
Thread Size 5/16"-18
Thread Diameter 0.313"
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

  • Easy hand-tightening operation with knurled thumb head design requiring no tools
  • Corrosion-resistant nylon construction suitable for electrical and marine applications
  • Wide temperature tolerance from -40° to 185°F for stable performance in varying environments
  • Secure thread engagement with UNC coarse threading and Class 2A fit for reliable fastening
  • Enhanced grip and control from raised round head profile with textured knurling
  • Full-length threading provides consistent holding power across the entire 1" length
  • Environmental compliance with RoHS 3 standards for safe use in regulated industries

Professional Applications & Engineering Value

This nylon plastic thumb screw delivers exceptional value in applications requiring frequent adjustments or where tool access is limited. The knurled round head provides superior tactile grip even with gloved hands, while the coarse UNC thread design ensures quick installation and removal. The plastic construction eliminates galvanic corrosion concerns when used with dissimilar metals, making it ideal for electrical enclosures, instrumentation panels, and marine equipment. With 11,000 psi tensile strength and temperature resistance from -40° to 185°F, this fastener maintains integrity in challenging environments where metal screws might fail due to thermal expansion or conductivity issues.

Specification Summary & Compliance

This thumb screw features 5/16"-18 UNC coarse threads with Class 2A thread fit for standard industrial applications. The fastener is fully threaded along its 1" length and includes a 1/2" collar diameter for enhanced load distribution. Manufactured in compliance with RoHS 3 (2015/863/EU) environmental standards, ensuring restriction of hazardous substances. The right-hand thread direction and coarse thread spacing provide reliable performance in plastic and soft material applications where fine threads might strip or fail.

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