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Yellow zinc-plated steel Grade 8 nylon insert lock nut 7/16-14

MIDWEST FASTENER CORP

MIDWEST FASTENER CORP Nylon Insert Lock Nut 7/16"-14 Steel Grade 8 Yellow 8208

SKU CH-91J8-70TNS

A steel Grade 8 lock nut with a nylon insert resists loosening on 7/16"-14 threads

  • Product typeNuts
  • Resists vibration loosening with nylon insert
  • Grade 8 steel handles high-stress loads
  • 7/16"-14 thread fits matching bolts
  • Yellow finish adds corrosion resistance
  • Ready to install straight from the box

Lock Nut for Vibration Resistance

This Grade 8 steel lock nut uses a nylon insert to resist loosening under vibration and torque. It suits automotive, industrial and general mechanical assemblies where fastener security is critical. The 7/16"-14 thread fits matching bolts and studs in high-stress joints. Yellow finish adds corrosion protection for extended service life.

Upgrade from Standard Hex Nuts

Standard hex nuts can back off when subjected to repeated shock or vibration. This lock nut replaces them in any 7/16"-14 location where a prevailing-torque feature is needed. The jump is worth it whenever equipment cycles through load changes or operates in mobile environments. Grade 8 strength matches high-tensile bolts without downgrading the joint.

Build Integration and Clearance

The nut threads onto any 7/16"-14 Grade 8 bolt or stud and requires only a standard wrench or socket for installation. No special tools, adhesives or locking washers are necessary. The nylon insert remains effective through multiple removal and reinstallation cycles. Yellow zinc coating simplifies visual inspection during maintenance checks.

How it compares

Measured against everything we stock in General Hardware & Accessories, at today’s prices. Recalculated every night.

Price $10.99
Cheaper than about 70% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameMIDWEST FASTENER
Product typeNuts

Questions about this item

What thread size and pitch does the 7/16"-14 nylon insert lock nut match?

The nut fits a 7/16 inch diameter bolt with 14 threads per inch, conforming to the standard coarse-thread series.

How do I install this Grade 8 lock nut so the nylon insert actually grips?

Run the nut onto the bolt until the nylon ring contacts the threads, then tighten to the Grade 8 torque value for 7/16"-14; the insert deforms to create prevailing torque.

When should I replace the nylon insert lock nut after it has been in service?

Replace the nut whenever it can be spun past the insert by hand or after any joint disassembly, because the nylon loses its locking force once deformed.

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