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SHOP ALL U-BOLTS HERE!
CHECK OUT THE CHART BELOW OR SHOP ALL LEAF SPRING UPPER AND LOWER SADDLE KITS HERE!
| APPLICATION-FABRICATED/STAMPED UPPER U-BOLT PLATE-REAR SUSPENSION | PART# | GRADE 8 U-BOLT SIZE |
| (1999-2007) Ford F250SD/F350SD SRW or DRW With 3″ Wide Rear Springs | BT8-500CK | 5/8X7-1/2″ |
| BT8-501CK | 5/8X8-1/2″ | |
| BT8-502CK | 5/8X9-1/2″ | |
| BT8-503CK | 5/8X10-1/2″ | |
| BT8-504CK | 5/8X11-1/2″ | |
| BT8-505CK | 5/8X12-1/2″ | |
| BT8-506CK | 5/8X13-1/2″ | |
| BT8-507CK | 5/8X14-1/2″ | |
| BT8-508CK | 5/8X15-1/2″ | |
| BT8-509CK | 5/8X16-1/2″ | |
| BT8-510CK | 5/8X17-1/2″ | |
| BT8-511CK | 5/8X18-1/2″ | |
Ford Leaf Spring Upper Saddle & U-Bolt Kits
ATS Springs offers complete upper saddle and U-bolt kits for Ford SuperDuty trucks, including F250SD, F350SD, and F450/550 applications. These kits are designed for rear suspension setups in both 2WD and 4WD trucks, and for single rear wheel (SRW) and dual rear wheel (DRW) configurations.
Features & Benefits:
- Direct Replacement: Exact fit for F250 and F350 SuperDuty rear suspension.
- Complete Kits: Include upper U-bolt saddles and Grade 8 U-bolts bent from threaded rods at ATS Springs.
- Easy Installation: Kits are assembled to replace both sides of the rear suspension in one purchase.
- Durable Construction: Grade 8 hardware ensures long-lasting strength and reliability.
- Secure Fit: Properly bent U-bolts and OEM-quality saddles restore safe load support and alignment.
Why Replace Upper Saddles & U-Bolts?
Over time, U-bolts can stretch or corrode, and saddles may crack or rust. Replacing them:
- Restores rear axle stability
- Maintains correct leaf spring alignment
- Ensures safe load handling for heavy-duty use
Installation Tips:
- Inspect leaf spring bushings, shackles, and hangers while installing the kit.
- Always use new Grade 8 U-bolts; do not reuse old bolts.
- Follow recommended torque specifications and check tightness after driving 100 miles.
ATS Springs’ Ford SuperDuty kits are assembled for one easy purchase, giving you the confidence and convenience of a complete, ready-to-install solution.