CURT trailer jack service parts often have similar sizes but different attachment methods. Some feet bolt to the end of a round jack tube, others use a removable safety pin, and marine replacement wheels are different from the tube-end caster assembly. Use the jack's MPN, tube diameter and original mounting geometry to identify the right part.
Identify the component before comparing dimensions
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 part-number identification
Match the jack's stamped model and the original mounting hardware before reusing an old pin or bracket.
| 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 |
Inspect the original jack before replacing a part
Check tube diameter, mounting-hole location, pivot-pin size, caster axle dimensions and the model number on the jack. Inspect for bent legs, corrosion or loose mounting bolts. A damaged structural jack should be evaluated before simply installing a new foot or handle.
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.
Find the matching CURT service part
Select the exact MPN to review the existing listing and availability.
CURT 28272
Pin-retained foot with 1-11/16-inch height; 28273 is the retail-packaged counterpart.
Check original part and availability
CURT 28273
Retail-package version of the 2-inch pin-on foot plate.
Check original part and availability
CURT 28276
Six-inch caster for suitable jack tubes; do not assume its rating matches a fixed foot.
Check original part and availability
CURT 28911
Replacement bars and bolts for the marine jack mount, not a complete jack.
Check original part and availability
CURT 28912
A replacement wheel assembly; not the pin-on tube-end caster 28276.
Check original part and availability
CURT 28921
Original-part replacement handle for the specified A-frame jack models.
Check original part and availability
CURT 28931
Weld-on male mount; confirm female 28930 counterpart and pin size.
Check original part and availability
CURT 28932
A different pull-pin diameter from 28931; do not interchange by appearance.
Check original part and availability
CURT 28938
Replacement mounting flange, not a complete trailer jack.
Check original part and availability
CURT 28964
Exact-model top-wind replacement; distinct from the 28921 A-frame crank.
Check original part and availabilityOther trailer-jack parts references
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