C.E. Smith 10401G
5-in roller mount · 5-in width; 3-in slot
One-piece mount with 5-in roller; mounting hardware not included.
C.E. Smith Boat Trailer Roller Shafts, Brackets & Pal Nuts
A worn boat-trailer roller may need a new roller, shaft, mounting bracket or retaining nut rather than a complete new support. C.E. Smith offers separate steel shaft lengths in ½-inch and ⅝-inch diameters, plus different roller mounting assemblies. This guide helps distinguish the components so you can measure the original assembly before selecting an exact replacement part number.
Three measurements to check first
Roller shaft diameterMeasure the existing steel shaft, not the roller's outside diameter. These replacements use ½-inch and ⅝-inch sizes, which take different roller bores and retaining hardware.
Usable shaft lengthCompare the complete original shaft and check the space between bracket arms, roller width, washers and end fasteners. A shaft of the right diameter can still be too short or too long.
Mounting assemblyDetermine whether you need only a shaft, a one-piece roller support or a two-piece adjustable mounting assembly. Check bracket width, slot and mounting fasteners.
Don't mix shaft sizes: C.E. Smith 10700A, 10701A and 10705A are listed as ½-inch shafts. 10725A and 10727A are ⅝-inch shafts. The separate 10801A retaining-nut set is listed for ⅝-inch shafts only.
C.E. Smith roller mounting hardware and MPN chart
Dimensions and package notes below are tied to the exact catalog part numbers. Match all hardware to your original trailer assembly rather than choosing solely by a similar-looking roller.
| Part number | Component | Dimensions | Package details | Product |
|---|---|---|---|---|
| 10401G | 5-in roller mount | 5-in width; 3-in slot | One-piece mount with 5-in roller; mounting hardware not included | View |
| 10403G | 8-in roller mount | 8-in width; 6-in slot | One-piece mount with 8-in roller and mounting hardware | View |
| 32003G | Adjustable roller support | 5-in width | Two-piece support with 5-in keel roller and mounting hardware | View |
| 10700A | Roller shaft | ½-in diameter × 5¼-in length | Steel replacement shaft; pal nuts included | View |
| 10701A | Roller shaft | ½-in diameter × 6¼-in length | Steel replacement shaft; pal nuts included | View |
| 10705A | Roller shaft | ½-in diameter × 12¾-in length | Steel replacement shaft; pal nuts included | View |
| 10725A | Roller shaft | ⅝-in diameter × 8⅞-in length | Steel replacement shaft; pal nuts included | View |
| 10727A | Roller shaft | ⅝-in diameter × 13-in length | Steel replacement shaft; pal nuts included | View |
| 10801A | Pal-nut set | ⅝-in shaft diameter | Eight push-on retaining nuts for ⅝-in roller shafts | View |
Compare boat-trailer roller hardware
Each card opens the corresponding part from NewRVParts. Confirm the mounting arrangement and included pieces against the original bracket and shaft.
One-piece and adjustable roller mounts
C.E. Smith 10403G
8-in roller mount · 8-in width; 6-in slot
One-piece mount with 8-in roller and mounting hardware.
C.E. Smith 32003G
Adjustable roller support · 5-in width
Two-piece support with 5-in keel roller and mounting hardware.
Replacement roller shafts
C.E. Smith 10700A
Roller shaft · ½-in diameter × 5¼-in length
Steel replacement shaft; pal nuts included.
C.E. Smith 10701A
Roller shaft · ½-in diameter × 6¼-in length
Steel replacement shaft; pal nuts included.
C.E. Smith 10705A
Roller shaft · ½-in diameter × 12¾-in length
Steel replacement shaft; pal nuts included.
C.E. Smith 10725A
Roller shaft · ⅝-in diameter × 8⅞-in length
Steel replacement shaft; pal nuts included.
C.E. Smith 10727A
Roller shaft · ⅝-in diameter × 13-in length
Steel replacement shaft; pal nuts included.
Retaining nuts
C.E. Smith 10801A
Pal-nut set · ⅝-in shaft diameter
Eight push-on retaining nuts for ⅝-in roller shafts.
Boat trailer roller replacement questions
Will a ½-inch roller shaft fit a ⅝-inch roller?
Do not assume so. The shaft diameter must match the roller bore, the bracket's mounting holes and the compatible retaining hardware.
Do all these C.E. Smith supports include a roller?
The listed 10401G, 10403G and 32003G assemblies include a roller. The 107-series products are replacement shafts, and 10801A contains retaining nuts rather than a roller or bracket.
Does every mounting bracket include its fasteners?
No. The catalog identifies mounting hardware with 10403G and 32003G, but not with 10401G. Check the exact part number and box contents before installation.
Can I use a ⅝-inch pal nut on a ½-inch shaft?
No. The 10801A pal-nut set is specified for ⅝-inch shafts. Retainers should match the actual shaft diameter and the manufacturer's assembly instructions.
Related boat-trailer roller references
For the rollers that fit within these supports, compare the earlier boat-trailer guide:
Also see C.E. Smith post guide-ons for boat-trailer alignment accessories.
Inspect bracket corrosion, roller wear and fastener retention before towing or loading the boat.
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