S-98694A216 5/8"-11 Square Nuts

Square Nuts

1055FA00018 Square Nuts
1055FA00018 Square Nuts

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

Part No.
Part No. 1055FA00018
Equivalent to mcmaster :
98694A216

Basic Information

System of Measurement Inch
Nut Type Square

Dimension Parameters

Width 1"
Height 35/64"

Thread Parameters

Thread Type UNC
Thread Size 5/8"-11
Thread Direction Right Hand
Thread Spacing Coarse
Thread Fit Class 2B

Head Parameters

Drive Style External Square

Material & Strength Parameters

Material Steel
Fastener Strength Grade/Class Grade 5

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (06/10/2022, 224 SVHC) 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

  • Exceptional load-bearing capacity with Grade 5 steel construction for reliable performance in high-stress applications
  • Secure, vibration-resistant fastening thanks to Class 2B thread fit ensuring precise engagement with mating components
  • Quick installation and removal with external square drive design that provides superior torque transmission
  • Optimized for demanding environments through coarse UNC threading that resists cross-threading and clogging
  • Enhanced durability and corrosion resistance from high-quality steel material meeting industrial standards
  • Regulatory compliance assurance with RoHS 3 and REACH compliance for safe use across various industries
  • Standardized compatibility with 5/8"-11 UNC threaded components for seamless integration into existing systems

Professional Applications & Engineering Value

This Grade 5 steel square nut delivers critical engineering value in industrial settings where vibration resistance and structural integrity are paramount. The 5/8"-11 UNC coarse thread configuration prevents loosening under dynamic loads while facilitating rapid assembly in maintenance and production environments. The external square drive design allows for high-torque installation using standard wrenches, making it ideal for machinery, structural steel connections, and heavy equipment where accessibility is limited. Manufactured from high-strength steel with precise Class 2B thread fit, this fastener maintains clamping force in high-vibration applications, reducing maintenance frequency and downtime in manufacturing, construction, and transportation sectors.

Specification Summary & Compliance

This square nut features 5/8"-11 UNC coarse threading with Class 2B thread fit per ASME B18.2.2 standards, ensuring precise dimensional accuracy and reliable performance. The fastener meets Grade 5 strength classification with dimensions of 1" width and 35/64" height. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and material traceability for industrial applications.

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