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Steel external tooth lock washer lock nut 1/4"-20

MIDWEST FASTENER CORP

MIDWEST FASTENER CORP External Tooth Lock Washer Lock Nut 1/4"-20 Steel 03820

SKU CH-7CE3-1PSJQ

Steel lock nut with external tooth washer resists loosening on 1/4"-20 threads

  • Product typeNuts
  • Resists loosening under vibration and torque
  • External tooth lock washer provides secure grip
  • 1/4"-20 thread fits matching fasteners
  • Steel construction delivers strength and durability
  • New condition ensures reliable performance

1/4"-20 Lock Nut

The MIDWEST FASTENER CORP external tooth lock washer lock nut is a steel fastener designed to resist loosening caused by vibration and torque. It suits mechanics, fabricators and maintenance staff who need a secure threaded connection on 1/4"-20 bolts or studs in automotive, industrial or general repair work.

Integrated Lock Washer

The external tooth lock washer is built into the nut, removing the need to fit a separate washer during assembly. This single-piece design reduces component count, saves installation time and ensures the locking teeth engage the mating surface automatically when the nut is tightened.

Thread and Material Check

Verify that the mating bolt or stud uses a 1/4"-20 thread pitch before ordering. Confirm that steel is compatible with the application environment, especially where corrosion resistance or electrical insulation are required. Ensure the nut’s locking action meets the vibration levels expected in the final assembly.

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

Does the external tooth lock washer on this 1/4"-20 nut wear out and need replacement?

The external teeth bite into the mating surface to resist vibration loosening; they are integral to the nut and not a separate replaceable component.

What stops this steel lock nut from holding under constant vibration?

The prevailing torque created by the deformed threads and external teeth is the limiting factor; if vibration exceeds that torque the nut can still back off.

Does the steel nut get hot or noisy when left under load all day?

A passive fastener generates no noise or measurable heat during continuous static loading; it simply maintains clamp force without active energy use.

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