Back to Casters

Caster Mounting Washers — Flat & Lock

Caster mounting washers — flat washers, split lock washers, fender washers, and tooth lock washers in standard caster bolt sizes (3/8, 1/2 inch). Required for proper caster installation to prevent the bolt from pulling through equipment material and to lock the bolt against vibration loosening. Bulk packs available. Stocked at our Mansfield, TX facility.

3/8 & 1/2 Standard Sizes Flat & Lock Washers Bulk Packs Zinc-Plated & Stainless 99% Same or Next-Day Ship

Shop Caster Washers

About Caster Washers

Washers distribute load and prevent bolt loosening. Every caster mount needs both flat washers (load distribution) and lock washers (anti-vibration). Skipping washers = caster falls off.

How to Choose

1. Match Bolt Diameter

3/8 inch washers for 3/8-16 bolts. 1/2 inch washers for 1/2-13 bolts.

2. Flat + Lock Standard

Use both: flat washer (distributes load) and lock washer (prevents loosening).

3. Material

Zinc-plated indoor. Stainless for outdoor/wet.

4. Quantity

2 washers per bolt (1 flat + 1 lock). 8 washers per caster (4 bolts).

Need help? Contact CasterHQ for support.

How CasterHQ Stocks Caster Washers

CasterHQ stocks 7 configurations at our Mansfield, TX facility. 99 percent ship same or next business day.

Frequently Asked Questions

Do I need washers for caster mounting

Yes — both flat and lock washers required.

What size washers

3/8 or 1/2 inch matching bolt diameter.

Flat vs lock

Flat distributes load. Lock prevents bolt loosening.

Zinc or stainless

Zinc for indoor. Stainless for outdoor.

How many do I need

8 per caster (4 flat + 4 lock).

How fast do they ship

99 percent same or next business day from Mansfield TX.

Why Buyers Choose CasterHQ

Washer Hardware Specialist99% Ship Same or Next Business Day30-Day Return Policy50,000+ Commercial BuyersBBB A+ Rated Since 2008Built for OEM & MRO Installs

Search