Detail 01
Lock washer
The split or toothed edge bites into the nut so vibration doesn't back it off over time.
Product detailSKU #1273888004001
FenderReplacement Lock Washers
Independent shopping perspective
The Korena take
Small replacement lock washers for guitar hardware. Buy when nuts on jacks, pots, or tuners keep working loose from vibration.
Strong match
Who this is for
- Fixing an output jack nut that loosens every few gigs
- Restocking the parts drawer during a full hardware refresh
- Reassembling a guitar after a control-cavity rewire
Consider the trade-offs
When to look elsewhere
- Anyone who hasn't measured the thread size they need
- Cosmetic fixes — these sit under the nut, out of sight
- Structural bolts on hardware or stands
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Fender replacement part
Sized to Fender's guitar hardware threads, which may not match import-spec pots and jacks.
Detail 03
Under $5
Cheaper than one shop visit for a loose jack, and you'll use the spares eventually.
Final check
Know before you order
- 01Confirm the thread diameter of the part you're securing first
- 02Wrong-size washers will spin free or refuse to seat
- 03A jack that loosens repeatedly may also need its wiring checked
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01What are these actually for?
They go under a nut on threaded guitar hardware — output jacks, pots, switches, tuner bushings — so string and amp vibration doesn't loosen the nut.
02How do I know what size I need?
Measure the threaded shaft on the part, or bring the old washer to match. Guitar hardware uses several thread sizes.
03Will these fit import guitars?
They're cut to Fender hardware specs. Import parts often use metric threads, so check before ordering.
04Do I need tools?
A nut driver or small wrench, and a screwdriver to get to the part. Nothing specialized.
