S-91833A114 3/8"-24 Thumb Nuts

Thumb Nuts

1038FA00012 Thumb Nuts
1038FA00012 Thumb Nuts

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

Part No.
Part No. 1038FA00012
Equivalent to mcmaster :
91833A114

Basic Information

System of Measurement Inch
Nut Type Thumb

Dimension Parameters

Height 3/4"

Thread Parameters

Thread Type UNF
Thread Size 3/8"-24
Threading Fully Threaded
Thread Direction Right Hand
Thread Spacing Fine
Thread Fit Class 2B

Head Parameters

Thumb Nut Head Shape Round
Thumb Nut Profile Standard
Head Diameter 1"
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) (01/17/2023, 233 SVHC) Compliant

Geometric Parameters

Collar Diameter 5/8"
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

  • Superior grip and torque application with fully knurled round head for reliable hand-tightening without tools
  • Excellent corrosion resistance thanks to 18-8 stainless steel construction for long service life in harsh environments
  • Precise and secure fastening with Class 2B thread fit and 3/8"-24 UNF fine threads for vibration resistance
  • Easy installation and adjustment with right-hand threading and fully threaded design for consistent engagement
  • Enhanced handling comfort from the round head shape and standard thumb nut profile
  • Durable industrial performance with 1" head diameter and 5/8" collar for stable load distribution
  • Compliance with global safety standards including REACH and RoHS 3 for environmentally responsible sourcing

Professional Applications & Engineering Value

This 18-8 stainless steel thumb nut delivers exceptional value in industrial settings where frequent adjustments and corrosion resistance are critical. The fully knurled round head provides maximum finger grip, eliminating the need for tools in machinery maintenance, assembly jigs, and electrical enclosures. Its 3/8"-24 UNF fine threading and Class 2B thread fit ensure precise engagement, reducing the risk of cross-threading in high-vibration applications like automotive fixtures and packaging equipment. The corrosion-resistant properties make it ideal for outdoor, marine, or chemical processing environments, while the right-hand thread direction offers intuitive operation for technicians. Engineered for durability and user convenience, this thumb nut streamlines operations in maintenance-heavy industries.

Specification Summary & Compliance

This thumb nut features Class 2B thread fit per UNF standards, ensuring precise dimensional accuracy and reliable performance. It complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) regulations, confirming adherence to environmental and safety requirements. The product meets standard manufacturing specifications for inch-system fasteners, with full threading and fine thread spacing for consistent application across industrial uses.

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