C.E. Smith 15252A
Inside: 3⅛ in wide × 3 in long
7/16-14 threads · Zinc-plated
Review product listingIdentify C.E. Smith 15252A–15283GA Square Trailer U-Bolts
Trying to replace a square U-bolt removed from an older boat trailer? The legs may look nearly identical, but a difference in the inside opening or thread pitch can prevent a safe match. Use the complete C.E. Smith part number and measure the remaining bracket or mounting location.
Parts 15252A and 15253A have the same 3⅛-inch inside width and 7/16-14 thread but different leg lengths. The 15274A also has a 3⅛-inch opening but uses larger 1/2-13 threads. The galvanized 15283GA is narrower and has its own inside length.
Identify the original U-bolt by dimensions
| MPN | Inside width | Inside leg length | Thread | Finish |
|---|---|---|---|---|
| 15252A | 3⅛ in | 3 in | 7/16-14 | Zinc-plated |
| 15253A | 3⅛ in | 4 in | 7/16-14 | Zinc-plated |
| 15274A | 3⅛ in | 4¼ in | 1/2-13 | Zinc-plated |
| 15283GA | 3¹⁄₁₆ in | 3¹³⁄₁₆ in | 1/2-13 | Galvanized steel |
Inside dimensions matter: The opening between the legs is not the bolt's outside width, and the listed inside length is not a guarantee of sufficient thread engagement after adding a mounting bracket and washers. Verify the entire assembly against the trailer and accessory manufacturer's requirements.
Replacement identification checks
- Look for packaging or the MPN. Keep the complete model designation, particularly the GA suffix on the galvanized part.
- Measure inside width. The clear gap between bolt legs helps distinguish the 3⅛-inch products from 15283GA at 3¹⁄₁₆ inches.
- Measure the leg length. Compare the original bracket stack and usable thread length, not just how far the legs extend beyond the frame.
- Confirm diameter and pitch. Identify 7/16-14 versus 1/2-13 threads before selecting nuts, washers or replacement bolts.
- Inspect mating hardware. Check the bracket holes, mounting face, corrosion and deformation. A similarly sized U-bolt is not automatically approved for another trailer or accessory.
- Confirm the replacement package. These listings show accompanying mounting hardware; verify current included components on the exact product page.
Matching C.E. Smith parts
These four UsedRVParts listings are catalogued as Brand New. Check each for current stock, supplied hardware and fulfillment details. Viewing or pickup in Kelowna is available by appointment only where the individual product permits it.
C.E. Smith 15253A
Inside: 3⅛ in wide × 4 in long
7/16-14 threads · Zinc-plated
Review product listing
C.E. Smith 15274A
Inside: 3⅛ in wide × 4¼ in long
1/2-13 threads · Zinc-plated
Review product listing
C.E. Smith 15283GA
Inside: 3¹⁄₁₆ in wide × 3¹³⁄₁₆ in long
1/2-13 threads · Galvanized steel
Review product listingRelated trailer support hardware
These fasteners are used with appropriate mounting brackets, but fit must be checked by the exact frame and bracket specification. For other trailer components, see the bunk bracket identification and bunk carpet identification guides.
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