S-90949A231 1/2"-13 Flange Nuts

Key Features & Benefits at a Glance

• Vibration-resistant locking through distorted thread technology prevents loosening in high-stress applications
• Enhanced corrosion protection with black-oxide steel finish for extended service life in harsh environments
• Integrated flange design eliminates need for separate washers and distributes load over wider surface area
• Reliable coarse threading with UNC 1/2"-13 specification ensures quick installation and removal
• Industrial-grade strength meeting Grade G requirements for demanding mechanical applications
• Precision Class 2B thread fit guarantees consistent performance and compatibility with standard bolts
• Regulatory compliance with RoHS 3 and REACH standards for global industrial use

Professional Applications & Engineering Value

This Grade G flange lock nut combines distorted thread locking technology with a black-oxide steel construction to solve critical vibration-induced loosening problems in industrial assemblies. The integrated 1 1/16" flange provides superior load distribution while eliminating the need for additional washers, reducing assembly time and component count. The UNC coarse threading ensures reliable engagement in high-vibration environments common in heavy machinery, automotive, and construction equipment. The external hex drive allows for standard tool compatibility, while the Class 2B thread fit maintains precise tolerances for consistent performance across production runs.

Specification Summary & Compliance

This flange lock nut features 1/2"-13 UNC coarse threading with Class 2B thread fit and right-hand thread direction. The nut meets Grade G strength classification requirements and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. Dimensions include 3/4" width, 9/16" height, with a 1 1/16" flange diameter and 0.08" flange thickness for optimal performance in industrial fastening applications.