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12″ x 15-3/8″ Plate Casters

Plate sizes: 12 x 15-3/8Diameter: 15-3/8 inCapacity: up to 12,000 lb
12 x 15-3/8 inch top-plate casters for warehouse carts on epoxy and smooth concrete. Typical builds show wheel diameters 15-3/8 in, polyurethane treads, and capacities 12,000 lb. Bring plate and stem measurements when replacing unmarked casters so the new corners sit level. Larger plates spread bolt stress on thick frames under continuous tow abuse. Replace worn corners in matched sets when possible so the cart tracks straight under load.

1 option in this exact size and spec. See all casters by load capacity and mount type › or call 844-439-4335 for a cross-reference.

12″ x 15-3/8″ Plate Casters: buying guide

12″ x 15-3/8″ plate casters — industrial top-plate mount casters with the 12″ x 15-3/8″ bolt-hole pattern. Capacity to 12,000 lb per caster on 14″ - 24″ wheels. Specified for mil-spec, aerospace ground support, specialty large platform. 1 styles stocked across Hamilton, Albion, Faultless, Caster Concepts, and Service Caster series. Standard bolt pattern: 9-1/2″ x 13″. Stocked at our Mansfield, TX facility for same or next-day shipping.

Plate Size: 12″ x 15-3/8″ Capacity: Up to 12,000 lb Wheel Range: 14″ - 24″ Mil-Spec Class Same or Next-Day Ship

12″ x 15-3/8″ Plate Caster Specs

Standard configurations and capacity tiers stocked for 12″ x 15-3/8″ top-plate casters. Match wheel size to floor condition and load.

Spec Standard Best For
Plate Size 12″ x 15-3/8″ Match existing equipment bolt pattern
Bolt Pattern 9-1/2″ x 13″ Verify with calipers before ordering
Capacity Range Up to 12,000 lb per caster mil-spec, aerospace ground support, specialty large platform
Wheel Sizes 14″ - 24″ Larger wheels = lower push force, higher deck
Tier Class Mil-Spec Spec match to load + duty cycle
Brands Stocked Hamilton, Albion, Faultless, Caster Concepts Cross-reference supported
Configurations Swivel, Rigid, Total Lock, Brake Spec at order
Ship Time Same-day before 3pm CT Mansfield, TX warehouse

How to Choose

1. Confirm Plate Pattern Match

Measure your existing equipment plate bolt-hole pattern with calipers. The 12″ x 15-3/8″ plate uses a 9-1/2″ x 13″ bolt pattern. Replacement casters must match BOTH the overall plate dimensions AND the bolt-hole spacing — even 1/16″ off prevents bolt-for-bolt install. Photograph the existing mount and email info@casterhq.com if unsure.

2. Capacity Sizing

Total cart load divided by 4 casters, plus 30% safety margin (50% for outdoor or shock applications). The 12″ x 15-3/8″ plate supports up to 12,000 lb per caster — that’s 48,000 lb total cart capacity at 4 casters. Match to your actual load, don’t exceed.

3. Wheel Size by Floor

Available wheel range: 14″ - 24″. Smooth concrete: smaller wheels work. Floor seams, thresholds, debris: 6″+ minimum. Outdoor or rough surfaces: 8″+ required. Larger wheels reduce push force by ~30% per 2″ diameter increase.

4. Wheel Material

Standard options for 12 x 15-3/8 plate: poly-on-iron (highest capacity, non-marking), cast iron (max capacity, marks floors), phenolic (heat-resistant), polyurethane (non-marking, quiet), pneumatic (rough terrain, shock absorption). Email info@casterhq.com with environment for material recommendation.

Engineer Tip: The 12″ x 15-3/8″ plate is a mil-spec mounting standard. Capacity is rated at static load — for shock loads (cart hitting thresholds, expansion joints), derate by 30-50% OR specify kingpinless construction. Email info@casterhq.com with cart weight, floor condition, and cycle count for a free engineering review.

Frequently Asked Questions

What is a 12″ x 15-3/8″ plate caster?

A top-plate mount industrial caster sized for the 12″ x 15-3/8″ bolt pattern. Capacity up to 12,000 lb per caster on 14″ - 24″ wheels. The plate dimensions and bolt pattern (9-1/2″ x 13″) determine compatibility with existing equipment mounts.

What capacity does 12″ x 15-3/8″ plate casters support?

Up to 12,000 lb per caster at static rating. For a 4-caster cart: 48,000 lb total capacity. Always size 30% above your peak load for safety margin (50% for shock-load applications).

What wheel sizes fit this plate?

The 12″ x 15-3/8″ plate supports 14″ - 24″ wheels in standard configurations. Larger wheels require longer hub bores but the top-plate dimensions stay constant. Verify wheel-to-floor clearance after install.

How do I know if my equipment uses this plate size?

Measure your existing mount with calipers: overall plate dimensions (12″ x 15-3/8″) AND bolt-hole spacing (9-1/2″ x 13″). Both must match for bolt-for-bolt replacement. Photograph the existing caster mount and email info@casterhq.com for cross-reference verification.

What brands do you stock?

Hamilton (heaviest capacity, mil-spec), Albion (USA-made, widest selection), Faultless (economy industrial), Caster Concepts (custom-engineered, fastest lead time for non-stock), and Service Caster (light-to-medium duty). All cross-reference supported.

Steel or stainless?

Standard 12″ x 15-3/8″ casters: zinc-plated or zinc-yellow chromate steel for indoor industrial. Stainless (304 or 316) for wet, washdown, food, pharma, chemical environments. Stainless costs 2-3x more and capacity is 70-80% of equivalent steel. Specify by environment.

Does the caster ship with mounting hardware?

Industrial plate casters ship without bolts — bolt length depends on frame thickness. Standard bolt sizes for 12″ x 15-3/8″ plate: 5/16″-18 to 1/2″-13 grade 5 zinc-plated. Use 4 bolts + lock washers + nuts per caster.

How fast does this ship?

Stock 12″ x 15-3/8″ casters ship same day from Mansfield, TX before 3pm CT. Freight-class sizes (12,000 lb capacity and above) are quoted at order. Engineer cross-reference: next-business-day response from info@casterhq.com.

12 x 15-3/8 Plate SpecialistsFull 12″ x 15-3/8″ plate caster line stocked across Hamilton, Albion, Faultless, Caster Concepts, and Service Caster. Every common configuration.
Engineer Cross-ReferenceBring us a competitor part number and we’ll match it from our catalog. Real engineering review, no scripts. 844-439-4335 or info@casterhq.com.
Same-Day Ship from TexasStock casters ship same day from Mansfield, TX before 3pm CT. Two-day delivery to most US locations.
Plate-Fitment VerifiedPhotograph your existing mount, email info@casterhq.com, and we’ll verify the plate pattern + bolt-hole spacing match before you order.

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