[100 PKG] Hex Lock Nuts Nylon Insert Grade C Medium Carbon Phosphate Oil 5/16-18
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[100 PKG] Hex Lock Nuts Nylon Insert Grade C Medium Carbon Phosphate Oil 5/16-18

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[100 PKG] Hex Lock Nuts Nylon Insert Grade C Medium Carbon Phosphate Oil 5/16-18

Mutual ScrewSKU: 31NSCBB
Price:
$34.87per 100( $0.35 each)
Pieces 100
Measurement type Inch
Thread size 5/16-18
Material Steel
Finish Phosphate Oil
Head style Hex
Weight 2.0 lb

WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to https://www.P65Warnings.ca.gov.

Description

Secure, vibration-resistant fastening with a Nylon Insert Hex Lock Nut. These Hex Lock Nuts Nylon Insert Grade C are engineered from Grade C medium carbon steel and finished with black phosphate and oil for durable corrosion resistance in demanding environments. The integral nylon insert provides a reliable locking mechanism that resists loosening under vibration and dynamic loads, making them ideal for automotive, machinery, and equipment assemblies. Threaded to 5/16-18, they are designed to pair with standard 5/16-18 bolts for a secure fit.

  • Locking mechanism: Integrated nylon insert prevents loosening from vibration and repeated cycling.
  • Material: Grade C medium carbon steel for dependable strength.
  • Finish: Black phosphate with oil for corrosion protection and lubricity.
  • Thread size: 5/16-18 UNC, compatible with standard fasteners.
  • Type: Hex lock nut for easy wrench access with common tools.
  • Applications: Automotive, industrial machinery, equipment assemblies, and other vibration-prone installations.

To maximize performance, install with proper torque according to the bolt specification and avoid overtightening. Inspect nylon insert for wear and replace if damaged to maintain locking capability. Store in a dry environment to extend service life.

Key specifications

Thread size: 5/16-18

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800-222-0324

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