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One of the unsung heroes of any leaf spring suspension upgrade, the humble leaf spring U-bolt has a very important job. The U-bolt keeps the leaf spring secure to the...
One of the unsung heroes of any leaf spring suspension upgrade, the humble leaf spring U-bolt has a very important job. The U-bolt keeps the leaf spring secure to the axle, ensuring proper axle position and maintaining the right suspension geometry and driveline angles.
Yet it’s easy to overlook the need for replacing or upgrading the leaf spring U-bolts in your suspension system. Unless of course, you’re running a modified suspension or non-stock front or rear axle. In those cases, you may need longer or wider leaf spring U-bolts to fit. For instance, adding lift blocks or lowering blocks to your axle could demand 4-inch,...
One of the unsung heroes of any leaf spring suspension upgrade, the humble leaf spring U-bolt has a very important job. The U-bolt keeps the leaf spring secure to the axle, ensuring proper axle position and maintaining the right suspension geometry and driveline angles.
Yet it’s easy to overlook the need for replacing or upgrading the leaf spring U-bolts in your suspension system. Unless of course, you’re running a modified suspension or non-stock front or rear axle. In those cases, you may need longer or wider leaf spring U-bolts to fit. For instance, adding lift blocks or lowering blocks to your axle could demand 4-inch, 8-inch or even longer leaf spring U-bolts. That’s because the U-bolt will have to compensate for the block, demanding extra length on the leaf spring U-bolt, so you still have enough thread length to secure the U-bolt nuts.
But even if you’re not adding lowering or lift blocks, running an aftermarket spring pack may require longer leaf spring U-bolts too, particularly if the spring pack features additional leaf or helper springs. Additional springs can increase the overall width of the spring pack, meaning that you may be unable to reuse the stock leaf spring U-bolts. So, if you’re upgrading leaf springs, take some measurements to determine if you’ll need new leaf spring U-bolts and, if so, how much longer those U-bolts need to be to complete your leaf spring installation.
If you’re simply swapping out stock parts for new ones, replacing your original leaf spring U-bolts may not be a bad idea either. Given their position on the vehicle, the threads on the end of your front or rear axle U-bolts are often exposed to the worst of what the road has to offer. Mud, salt, large rocks—there are plenty of road hazards that can severely damage your leaf spring U-bolt threads, or bend and distort the ends of the U-bolts entirely. Even up top where they wrap around the axle, your leaf spring U-bolts may be worn, corroded, or otherwise degraded to the point where you’ll need to replace them.
Standard or long, front or rear axle, whatever leaf spring U-bolts you need for your ride, you’ll find them right here, at Summit Racing.
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U Bolt, Leaf Spring, 7-5/8 in. Length, 1/2 in. Diameter, 3 in. Width, Round, Steel, Zinc Plated, Grade 8, Each
Part Number: SUM-792000
Estimated Ship Date: Today
Estimated Ship Date: Today
U-Bolts, Steel, Zinc Finish, Round-Style, Front, Chevy, GMC, Set of 4
Part Number: SLF-3318
Estimated Ship Date: Today
Estimated Ship Date: Today
U-Bolts, Leaf Springs, 9.625 in. Length, 2.563 in. Width, 0.562 in. Diameter, Black, Steel, Cadillac, Chevy, GMC, Pair
Part Number: RNB-929-723
Estimated Ship Date: Today
Estimated Ship Date: Today
U-Bolt Repair Kit
Part Number: RNB-929-704
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
U-Bolt, Leaf Spring, Round, 7 in. Length, 3.25 in. Width, Steel, Gold Iridited, Set of 4
Part Number: CLV-UR325X70
Estimated Ship Date: Today
Estimated Ship Date: Today
U-Bolts, Rear Multi-Leaf Spring, Chevy, Pontiac, Pair
Part Number: OER-RL7
Estimated Ship Date: Today
Estimated Ship Date: Today
Axle U-Bolt, Round Style, Steel, Black, Rear, Ford, Each
Part Number: SDK-C7ZZ-5705-LK
Estimated Ship Date: Today
Estimated Ship Date: Today
Leaf Spring U-Bolts, U-Bolt Repair Kit, Round U-bolt Style, Steel, Black, 7.750 in. Length, Chevrolet, GMC, Pair
Part Number: RNB-929-707
Estimated Ship Date: Today
Estimated Ship Date: Today
U Bolts, Steel, Black EDP Coated, Round 15 in Length. 3.625 in, Wide, 0.625 in Diameter, Nuts, Washers, Each
Part Number: BDX-UBT4034
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
U Bolts w/ Hardware, 2015-2020 F150
Part Number: IHC-IHC-F1522-UB
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
U Bolts, Steel, Black EDP Coated, Round, 12.5 in Length. 4.0 in, Wide, 0.563 in Diameter, Nuts, Washers, Each
Part Number: BDX-UBT4067
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
U Bolts, Leaf Spring, Round, Steel, Black, 10.50 in. Length, 5/8 in. Diameter, 3.00 in. Width, Jeep, Set of 4
Part Number: ROU-7613
Not Yet Reviewed
Estimated Ship Date: Dec 26, 2025 if ordered today
Estimated Ship Date: Dec 26, 2025 if ordered today
U Bolts, Steel, Black EDP Coated, Square, 15 in Length. 3.125 in, Wide, 0.563 in Diameter, Nuts, Washers, Each
Part Number: BDX-UBT4049
Estimated Ship Date: Today
Estimated Ship Date: Today
U Bolts, Leaf Spring, Round, Steel, Black, 8.50 in. Length, 5/8 in. Diameter, 3.00 in. Width, Jeep, Set of 4
Part Number: ROU-7615
Not Yet Reviewed
Estimated Ship Date: Dec 29, 2025 if ordered today
Estimated Ship Date: Dec 29, 2025 if ordered today
U Bolts, Leaf Spring, Round, Steel, Black, 9.50 in. Length, 9/16 in. Diameter, 3.25 in. Width, Jeep, Set of 4
Part Number: ROU-7623
Not Yet Reviewed
Estimated Ship Date: Dec 29, 2025 if ordered today
Estimated Ship Date: Dec 29, 2025 if ordered today
U Bolts, Leaf Spring, Round, Steel, Black, 10.00 in. Length, 9/16 in. Diameter, 3.625 in. Width, Jeep, Set of 4
Part Number: ROU-7655
Not Yet Reviewed
Estimated Ship Date: Dec 26, 2025 if ordered today
Estimated Ship Date: Dec 26, 2025 if ordered today
Axle U-Bolt, Round Style, Steel, Black, Rear, Ford, Each
Part Number: SDK-C5ZZ-5705-K
Estimated Ship Date: Today
Estimated Ship Date: Today
U-Bolts, Rear Multi-Leaf Spring, Chevy, Pontiac, Pair
Part Number: OER-RL7A
Estimated Ship Date: Today
Estimated Ship Date: Today
U-Bolt, Leaf Spring, Round, 9 in. Length, 3.25 in. Width, Steel, Gold Iridited, Set of 4
Part Number: CLV-UR325X90
Estimated Ship Date: Today
Estimated Ship Date: Today
U Bolts, Leaf Spring, Round, Steel, Black, 6.75 in. Length, 1/2 in. Diameter, 2.50 in. Width, Jeep, Set of 4
Part Number: ROU-7601
Not Yet Reviewed
Estimated Ship Date: Dec 22, 2025 if ordered today
Estimated Ship Date: Dec 22, 2025 if ordered today
U Bolts, Leaf Spring, Round, Steel, Black, 8.50 in. Length, 9/16 in. Diameter, 3.75 in. Width, Jeep, Set of 4
Part Number: ROU-7605
Not Yet Reviewed
Estimated Ship Date: Dec 22, 2025 if ordered today
Estimated Ship Date: Dec 22, 2025 if ordered today
U Bolts, Leaf Spring, Round, Steel, Black, 7.25 in. Length, 9/16 in. Diameter, 3.00 in. Width, Jeep, Set of 4
Part Number: ROU-7622
Not Yet Reviewed
Estimated Ship Date: Dec 29, 2025 if ordered today
Estimated Ship Date: Dec 29, 2025 if ordered today
U Bolts, Leaf Spring, Round, Steel, Black, 7.50 in. Length, 9/16 in. Diameter, 3.25 in. Width, Jeep, Set of 4
Part Number: ROU-7648
Not Yet Reviewed
Estimated Ship Date: Dec 29, 2025 if ordered today
Estimated Ship Date: Dec 29, 2025 if ordered today
U Bolts, Leaf Spring, Square, Steel, Black, 16.00 in. Length, 5/8 in. Diameter, 2.625 in. Width, Set of 4
Part Number: ROU-7665
Not Yet Reviewed
Estimated Ship Date: Dec 29, 2025 if ordered today
Estimated Ship Date: Dec 29, 2025 if ordered today
U Bolts, Leaf Spring, Round, Steel, Black, 6.75 in. Length, 1/2 in. Diameter, 2.75 in. Width, Jeep, Set of 4
Part Number: ROU-7621
Not Yet Reviewed
Estimated Ship Date: Dec 29, 2025 if ordered today
Estimated Ship Date: Dec 29, 2025 if ordered today
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