S-91833A125 10-24 Thumb Nuts

Thumb Nuts

1038FA00020 Thumb Nuts
1038FA00020 Thumb Nuts

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

Part No.
Part No. 1038FA00020
Equivalent to mcmaster :
91833A125

Basic Information

System of Measurement Inch
Nut Type Thumb

Dimension Parameters

Height 7/16"

Thread Parameters

Thread Type UNC
Thread Size 10-24
Threading Fully Threaded
Thread Direction Right Hand
Thread Spacing Coarse
Thread Fit Class 2B

Head Parameters

Thumb Nut Head Shape Round
Thumb Nut Profile Standard
Head Diameter 1/2"
Head Texture Knurled

Material & Strength Parameters

Material 18-8 Stainless Steel

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (07/08/2021, 219 SVHC) Compliant

Geometric Parameters

Collar Diameter 3/8"
Collar Height 1/4"
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Enhanced manual tightening efficiency with a precision knurled round head for superior grip in high-vibration environments
  • Superior corrosion resistance thanks to 18-8 stainless steel construction, ideal for harsh industrial settings
  • Quick and secure installation with fully threaded UNC coarse threads and Class 2B fit for reliable engagement
  • Optimized dimensional stability featuring a 3/8" collar diameter and 7/16" height for consistent performance
  • Right-hand threading compatibility ensures straightforward integration with standard 10-24 threaded components
  • Compliance with global standards including REACH and RoHS 3, meeting environmental and safety regulations
  • Durable long-term operation due to robust material and coarse thread spacing reducing wear in frequent adjustments

Professional Applications & Engineering Value

This 10-24 UNC thumb nut in 18-8 stainless steel addresses common assembly challenges by combining a knurled round head for effortless hand-tightening with full threading that prevents cross-threading in repetitive use. Its coarse thread design and Class 2B thread fit ensure rapid installation and secure fastening in machinery, electronics, and automotive systems, where tool-free adjustments are critical. The corrosion-resistant material withstands exposure to moisture and chemicals, reducing maintenance needs in industrial environments. By integrating this fully threaded thumb nut, engineers achieve faster production cycles and enhanced reliability in applications requiring frequent disassembly.

Specification Summary & Compliance

This thumb nut adheres to UNC coarse thread standards with a 10-24 thread size and Class 2B thread fit for precise dimensional accuracy. Manufacturing complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) directives, ensuring environmental safety. Key specifications include a 3/8" collar diameter, 1/2" head diameter, and right-hand thread direction, supporting consistent performance in regulated industries.

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