CURT trailer jack parts include support feet, caster wheels, swivel mounting hardware and crank handles. A part that fits a 2-inch round tube is not necessarily suitable for another jack with similar dimensions. This guide compares exact CURT numbers and their functions so you can identify the appropriate repair component rather than replacing the entire jack.
Jack feet, wheels and mounting hardware differ
28270 bolts to a compatible 2-inch tube; 28272 and 28273 use a safety pin. 28276 is a rolling tube-end caster, while 28912 is a replacement marine-jack wheel.
28931 and 28932 are male pipe mounts with different retaining-pin diameters. 28938 is a bolt-through flange, while 28911 supplies marine-jack mounting bars and bolts.
28921 belongs to selected top-wind A-frame jacks; 28964 is identified for the 28570 direct-weld square jack. Neither is universal.
CURT trailer jack service-part compatibility chart
The rating applies to the stated part under CURT's installation conditions. A 2,000-lb foot does not increase the load rating of a lower-rated jack.
| MPN | Replacement type | Intended fit | Included / interface | Rating reference |
|---|---|---|---|---|
| 28270 | Bolt-on foot plate | 2-inch round jack tube | Nut and bolt | 2,000 lb support |
| 28272 | Pin-on foot plate | 2-inch round jack tube | Safety pin | 2,000 lb support |
| 28273 | Pin-on foot plate, packaged | 2-inch round jack tube | Safety pin | 2,000 lb support |
| 28276 | Removable jack caster | Compatible 2-inch round jack tube | Safety pin | 1,200 lb support |
| 28911 | Marine jack bolt-through hardware | Compatible CURT marine trailer jacks | 2 mounting bars and 4 bolts | Follow jack instructions |
| 28912 | Marine jack replacement wheel | Compatible CURT marine swivel jack | 6-inch wheel, bolt and bushing | Follow jack instructions |
| 28921 | Top-wind A-frame jack handle | CURT 28200 / 28202 / 28203 / 28250 | Crank handle and fitting hardware | Not a load-bearing foot |
| 28931 | Male swivel pipe mount | Selected CURT pipe-mount swivel jacks | 9/16-inch pull-pin opening | Follow installed jack rating |
| 28932 | Male swivel pipe mount | Selected CURT pipe-mount swivel jacks | 5/8-inch pull-pin opening | Follow installed jack rating |
| 28938 | Bolt-through swivel jack flange | Compatible CURT bracket-mounted swivel jack | Mounting flange only | Follow installed jack rating |
| 28964 | Top-wind square jack handle | CURT 28570 direct-weld jack | Crank handle and fitting hardware | Not a load-bearing foot |
Installation, support and compatibility checks
Keep the trailer supported safely while changing service components. Follow CURT's current instructions for the original jack, including pin engagement, fastener torque and weld requirements. A mounting bracket or replacement handle does not carry its own independent trailer-support rating.
CURT 28276 is a removable caster that fits a compatible 2-inch jack tube; 28912 is a marine-jack replacement wheel with a bolt and bushing. CURT 28931 and 28932 use different swivel pin-hole sizes, and must be paired with the correct mount.
For boat trailers, inspect the marine jack's corrosion protection and the trailer frame's mounting strength. Rolling casters should only be used within their specified load and surface limits.
CURT jack feet, casters, swivels and cranks
Choose a part number below to review current product details and availability.


CURT 28272
Pin-retained foot with 1-11/16-inch height; 28273 is the retail-packaged counterpart.
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CURT 28273
Retail-package version of the 2-inch pin-on foot plate.
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CURT 28276
Six-inch caster for suitable jack tubes; do not assume its rating matches a fixed foot.
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CURT 28911
Replacement bars and bolts for the marine jack mount, not a complete jack.
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CURT 28912
A replacement wheel assembly; not the pin-on tube-end caster 28276.
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CURT 28921
Original-part replacement handle for the specified A-frame jack models.
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CURT 28931
Weld-on male mount; confirm female 28930 counterpart and pin size.
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CURT 28932
A different pull-pin diameter from 28931; do not interchange by appearance.
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CURT 28938
Replacement mounting flange, not a complete trailer jack.
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CURT 28964
Exact-model top-wind replacement; distinct from the 28921 A-frame crank.
View product details and availabilityRelated trailer jack repair guides
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