S-90630A221 2 1/4"-8 Locknuts
Locknuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Temperature & Environment Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance through nylon insert locking that maintains secure fastening in high-stress environments
- Heavy-duty performance with Grade 8 steel construction providing exceptional strength and durability
- High-temperature capability with nylon insert rated to 220°F for reliable performance in demanding thermal conditions
- Precise thread engagement with Class 2B fit UNC coarse threading ensuring consistent installation and removal
- Easy installation and removal using standard external hex drive compatible with common industrial tools
- Regulatory compliance meeting REACH and RoHS 3 standards for safe use in industrial applications
- Optimal sizing with 2 1/4"-8 thread specification providing robust fastening for heavy machinery and equipment
Professional Applications & Engineering Value
This Grade 8 steel locknut with nylon insert delivers critical vibration resistance in demanding industrial environments where mechanical stresses and thermal fluctuations compromise fastener integrity. The UNC coarse threading with Class 2B fit ensures reliable engagement in heavy machinery, construction equipment, and transportation systems where vibration-induced loosening poses significant safety risks. The external hex drive facilitates efficient installation using standard tools, while the high-temperature nylon insert (rated to 220°F) maintains locking performance in elevated temperature applications. Engineered for heavy-duty applications, this locknut prevents costly downtime and maintenance by providing secure, long-lasting fastening solutions in manufacturing, automotive, and industrial assembly operations.
Specification Summary & Compliance
This locknut features 2 1/4"-8 UNC coarse threading with Class 2B thread fit precision, right-hand thread direction, and dimensions of 3 33/64" width and 2 13/16" height. Manufactured from Grade 8 steel for maximum strength, the component is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) regulations, ensuring environmental safety and industrial reliability. The external hex drive design conforms to standard industrial fastening systems for consistent performance across applications.
