S-91725A140 1/2"-13 Thumb Nuts

Key Features & Benefits at a Glance

• Enhanced grip and torque application with full-circumference knurling for secure hand-tightening in tight spaces
• Superior corrosion resistance from 18-8 stainless steel construction, ideal for humid or chemical environments
• Quick installation and removal with low-profile round design requiring no special tools
• Secure fastening performance through Class 2B thread fit ensuring consistent engagement with mating components
• Additional mounting flexibility with four 7/32" holes for secondary securing or safety wiring
• Reliable coarse thread performance using 1/2"-13 UNC threads that resist loosening under vibration
• Compliance with environmental regulations meeting both RoHS 3 and REACH standards for industrial use

Professional Applications & Engineering Value

This 1/2"-13 UNC knurled thumb nut delivers exceptional value in applications requiring frequent adjustments or tool-less operation. The 18-8 stainless steel construction provides excellent corrosion resistance for machinery, marine equipment, and food processing applications where moisture resistance is critical. The low-profile round design with knurled texture offers superior finger grip while maintaining a compact form factor. With Class 2B thread fit and coarse threading, this thumb nut ensures reliable engagement and vibration resistance in industrial assemblies, panel mounting, and access covers. The four mounting holes enable additional securing methods, making it ideal for safety-critical applications where secondary retention is required.

Specification Summary & Compliance

This thumb nut features 1/2"-13 UNC coarse threads with Class 2B thread fit for consistent mating with standard bolts. The inch-system component maintains precise dimensional accuracy with a 1-1/8" head diameter and 7/16" height. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring suitability for regulated industries and international markets.