Fastenal 1137021 5/16 in. -18 Grade 2 Zinc Finish NE Steel Nylon Insert Lock Nut

Fastenal 1137021 5/16 in. -18 Grade 2 Zinc Finish NE Steel Nylon Insert Lock Nut Description

The Fastenal 1137021 5/16 in.-18 Grade 2 Steel Nylon Insert Lock Nut is engineered for secure, vibration-resistant fastening in a wide range of industrial and mechanical applications. Manufactured from durable steel and finished with a protective zinc coating, this lock nut delivers reliable corrosion resistance while maintaining structural integrity in demanding environments. The integrated nylon insert creates a prevailing torque that resists loosening, ensuring long-lasting performance even under constant motion or vibration.

Features

• Vibration-Resistant Locking: Nylon insert secures threads to prevent loosening under movement or dynamic loads
• Durable Steel Construction: Provides strength and reliability for industrial and mechanical applications
• Corrosion Protection: Zinc finish enhances resistance to rust and environmental wear
• Easy Installation: Hex design allows for straightforward tightening with standard wrenches or sockets
• Standards Compliant: Meets ASME B18.16.6 and ASTM F1941/F1941M for assured quality and performance

Specifications

• Dia/Thread Size: 5/16 in.-18
• Finish: Zinc
• Grade: Grade 2
• Locking Mechanism: Nylon Insert
• Material: Steel
• Series: NE
• Standards: ASME B18.16.6; ASTM F1941/F1941M
• System of Measurement: Imperial (Inch)
• Thread Style: Full Thread
• Thread Type: Coarse
• Thickness: 0.359 in.
• Type: Nylon Insert Lock Nut
• UNSPSC: 31161716
• Wrench Size: 1/2 in.

Downloads

Specifications Sheet (PDF Download)