S-91833A152 8-32 Thumb Nuts

Thumb Nuts

1038FA00033 Thumb Nuts
1038FA00033 Thumb Nuts

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

Part No.
Part No. 1038FA00033
Equivalent to mcmaster :
91833A152

Basic Information

System of Measurement Inch
Nut Type Thumb

Dimension Parameters

Height 5/8"

Thread Parameters

Thread Type UNC
Thread Size 8-32
Threading Partially Threaded
Thread Direction Right Hand
Thread Spacing Coarse
Thread Fit Class 2B
Thread Depth 1/4"

Head Parameters

Thumb Nut Head Shape Round
Thumb Nut Profile Standard
Head Diameter 3/4"
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 5/16"
Collar Height 1/2"
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Corrosion-resistant 18-8 Stainless Steel construction ensures long-term durability and reliability in harsh industrial environments, reducing replacement frequency and maintenance costs.
  • Knurled round head design provides superior finger-tip grip for quick, tool-free installation and removal, speeding up assembly and disassembly processes.
  • 8-32 UNC coarse threading with Class 2B fit offers excellent engagement and consistent clamping force, minimizing cross-threading risks and ensuring secure fastening.
  • Partially threaded shank allows for precise positioning and prevents over-tightening, protecting components from damage during manual adjustments.
  • REACH and RoHS 3 compliance guarantees adherence to strict international environmental and safety standards, making it suitable for regulated industries and global supply chains.
  • Generous 3/4" head diameter and 5/8" height deliver enhanced handling comfort and sufficient surface contact, improving torque application and operational efficiency.
  • Right-hand thread direction aligns with standard assembly practices, facilitating intuitive use and reducing operator errors in fast-paced work settings.

Professional Applications & Engineering Value

This 18-8 Stainless Steel Thumb Nut is engineered to address common challenges in manual assembly and maintenance operations. The knurled round head ensures a firm, non-slip grip even with oily hands or gloves, eliminating the need for tools and reducing assembly time in industrial hardware applications. Its corrosion-resistant properties make it ideal for use in humid, chemical-exposed, or outdoor environments, such as electrical enclosures, machinery panels, and automotive components. The 8-32 UNC coarse thread and Class 2B fit provide reliable thread engagement, preventing loosening under vibration while allowing for repeated adjustments without wear. By combining ease of use with robust stainless steel construction, this thumb nut enhances productivity and reduces downtime in settings requiring frequent access or quick modifications.

Specification Summary & Compliance

This thumb nut features precision UNC coarse threading with a Class 2B thread fit, ensuring dimensional accuracy and smooth engagement. Key specifications include a thread size of 8-32, partial threading up to 1/4" depth, right-hand direction, and a collar diameter of 5/16". The product complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) regulations, confirming its adherence to environmental and safety standards for hazardous substance restrictions.

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