S-91185A309 8-32 x 1" Thumb Screws

Thumb Screws

0773FA00020 Thumb Screws
0773FA00020 Thumb Screws

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

Part No.
Part No. 0773FA00020
Equivalent to mcmaster :
91185A309

Basic Information

System of Measurement Inch

Head Parameters

Head Type Thumb
Thumb Screw Head Shape Round
Round-Head Thumb Screw Profile Low
Head Diameter 1/2"
Head Height 7/32"
Head Texture Knurled
Head Material Acetal Plastic
Head Temperature Range 32° to 180° F

Dimensions

Length 1"

Thread Parameters

Thread Type UNC
Thread Size 8-32
Thread Diameter 0.164"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 3A
Threading Fully Threaded

Material & Strength

Material 18-8 Stainless Steel
Hardness Not Rated

Temperature & Environment

REACH Compliant
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

  • Enhanced Grip and Torque Application: Knurled acetal plastic head ensures secure handling and maximum torque transfer without slipping, even in demanding industrial environments.
  • Superior Corrosion Resistance: Made from 18-8 stainless steel, offering excellent durability and resistance to rust and oxidation in various conditions.
  • Precision Fastening with High Thread Fit: Class 3A thread fit provides tighter tolerances for reliable, vibration-resistant connections in precision assemblies.
  • Wide Temperature Compatibility: Operates effectively in temperatures from 32° to 180° F, suitable for diverse industrial and electronic applications.
  • Low Profile Design for Space Efficiency: Round low-profile head allows for use in confined spaces without compromising on accessibility and ease of use.
  • Full Thread Engagement: Fully threaded design ensures consistent holding power along the entire 1" length, enhancing load distribution.
  • Eco-Friendly Compliance: RoHS 3 and REACH compliant, meeting strict environmental regulations for safe and sustainable use in global markets.

Professional Applications & Engineering Value

This 8-32 UNC thumb screw is engineered to address common fastening challenges in industrial settings, such as frequent adjustments and exposure to corrosive elements. The combination of 18-8 stainless steel and a knurled acetal plastic head delivers a robust solution that resists wear and provides a non-slip surface for manual tightening. Ideal for applications in electronics, machinery, and enclosures, the low-profile round head and fully threaded design ensure secure, repeatable fastening without specialized tools. Its right-hand thread and coarse threading enable quick installation and removal, reducing downtime in maintenance-heavy environments while maintaining precision and reliability under varying operational temperatures.

Specification Summary & Compliance

This thumb screw adheres to UNC thread standards with a Class 3A thread fit for high precision and consistent performance. Key dimensions include a 1" length, 8-32 thread size, and coarse thread spacing. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence for industrial and commercial use.

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