Leaf Spring Center Bolts
+1-989-755-0561 1-800-358-4751

Leaf Spring Center Bolts

Leaf Spring Center Bolts

Upgrade or replace your leaf spring center bolt with high quality OEM replacements. If you have a broken leaf spring center pin or need to upgrade to a longer one for a newly added leaf, we have them in stock. We have been installing and selling leaf spring repair parts and components for years, feel free to call us with any questions.

Found 37 Matching Products
Filter the list of Matching Products by selecting any of these options:
  1. Nuts / Bolts
  1. Spring Bolt
  1. 9/16 x 3/8 inch
  1. 5/8 x 3/8 inch
  1. 3/4 x 7/16 inch
  1. 3 inches
  2. 4 inches
  3. 5 inches
  1. 5.00 inches
  2. 6 inches
  3. 6.00 inches
  1. 6.50 inches
  2. 8 inches
  3. 9 inches
  1. 9-1/2 inches
  2. 1-1/2 inches
  3. 10 inches
  1. 11 inches
  2. 12 inches
  3. 5-1/2 inches
  1. 6-1/2 inches
  1. 5/16 inch
  1. 3/8 inch
  1. 7/16 inch
  1. 1/2 inch
  1. 3/4 inch
  1. 1 inch
  1. Fine
  1. Course
  1. 8
  2. 10
  1. 13
  2. 14
  1. 18
  2. 20
  1. 24
v
SKU HW19-29202
$6.30

Flange bolt with nut. 5-1/2 inch length, 5/8 inch diameter with flange lock nut.   Details

Typically ships in 5 to 7 business days.
  • Diameter:1 inch
  • Length:5-1/2 inches
  • Automann Number:BKC580512GR8F
  • Batco Number:09-8432
  • Chalmers Number:K880231
  • Chevrolet / GM Number:15522519
  • Dayton Number:334-754
  • Euclid Number:E-7773
  • Flagg Number:CHA60
  • Fruehauf Number:N805041-S2
  • Haldex Number:CQ70417
  • Leland Number:SB1211
  • UPC: 751354037968
  • MPN: HW19-29202
SKU C916412
$2.86

Leaf spring bolt for Dodge, GM and Ford trucks. 4.5 inch length with 9/16 inch - 12 threads. 1.   Details

20+ In Stock as of May 18, 2021 6:37 AM EST.
  • Automann Number:M5112
  • MPN: C916412
SKU C916500
$3.18

Leaf spring bolt for Dodge, GM and Ford trucks. 5.0 inch length with 9/16 inch - 12 threads. 1.   Details

20+ In Stock as of May 18, 2021 6:37 AM EST.
  • Automann Number:C916500GR5, M5108
  • MPN: C916500
SKU CB120100
$4.17

1/2 x 10 inch center bolt with SAE 1/2-20 fine hex nut. 9-1/2 inches minimum thread length.   Details

Typically ships in 5 to 7 business days.
  • Diameter:1/2 inch
  • Length:10 inches
  • Minimum Thread:9-1/2 inches
  • Thread Size:20
  • Thread Type:Fine
  • Head Size:3/4 x 7/16 inch
  • MPN: CB120100
SKU CB120600
$2.65

1/2 x 6 inch center bolt with SAE 1/2-20 fine hex nut. 4 inches minimum thread length.   Details

20+ In Stock as of May 18, 2021 6:37 AM EST.
  • Diameter:1/2 inch
  • Length:6 inches
  • Minimum Thread:4 inches
  • Thread Size:20
  • Thread Type:Fine
  • Head Size:3/4 x 7/16 inch
  • MPN: CB120600
SKU CB120800
$3.20

1/2 x 8 inch center bolt with SAE 1/2-20 fine hex nut. 5-1/2 inches minimum thread length.   Details

20+ In Stock as of May 18, 2021 6:37 AM EST.
  • Diameter:1/2 inch
  • Length:8 inches
  • Minimum Thread:5-1/2 inches
  • Thread Size:20
  • Thread Type:Fine
  • Head Size:3/4 x 7/16 inch
  • MPN: CB120800
SKU CB120400
$2.23

1/2 x 4 inch center bolt with SAE 1/2-20 fine hex nut. 3 inches minimum thread length.   Details

18 In Stock as of May 18, 2021 6:37 AM EST.
  • Diameter:1/2 inch
  • Length:4 inches
  • Minimum Thread:3 inches
  • Thread Size:20
  • Thread Type:Fine
  • Head Size:3/4 x 7/16 inch
  • MPN: CB120400
SKU CB380300
$1.20

3/8 x 3 inch center bolt with SAE 3/8-24 fine hex nut. 2-1/2 inches minimum thread length.   Details

20+ In Stock as of May 18, 2021 6:37 AM EST.
  • Diameter:3/8 inch
  • Length:3 inches
  • Minimum Thread:2-1/2 inches
  • Thread Size:24
  • Thread Type:Fine
  • Head Size:9/16 x 3/8 inch
  • MPN: CB380300
SKU CB516300
$0.91

5/16 x 3 inch center bolt with 5/16-18 course hex nut. 2-1/2 inches minimum thread length.   Details

11 In Stock as of May 18, 2021 6:37 AM EST.
  • Diameter:5/16 inch
  • Length:3 inches
  • Minimum Thread:2-1/2 inches
  • Thread Size:18
  • Thread Type:Course
  • MPN: CB516300
SKU C120300
$1.34

1/2 x 13 course thread, 3 inches long hex bolt. Thread length 1.350 inches.   Details

20+ In Stock as of May 18, 2021 6:37 AM EST.
  • Diameter:1/2 inch
  • Length:3 inches
  • Minimum Thread:1.35 inches
  • Thread Size:13
  • Thread Type:Course
  • MPN: C120300
SKU C916400
$2.66

Leaf spring bolt for Dodge, GM and Ford trucks. 4.0 inch length with 9/16 inch - 12 threads. 1.   Details

20+ In Stock as of May 18, 2021 6:37 AM EST.
  • Automann Number:M5110
  • Ford Number:433179, 56214S4
  • MPN: C916400
SKU CB120120
$4.20

1/2 x 12 inch center bolt with SAE 1/2-20 fine hex nut. 9-1/2 inches minimum thread length.   Details

20+ In Stock as of May 18, 2021 6:37 AM EST.
  • Diameter:1/2 inch
  • Length:12 inches
  • Minimum Thread:9-1/2 inches
  • Thread Size:20
  • Thread Type:Fine
  • Head Size:3/4 x 7/16 inch
  • MPN: CB120120

What is a leaf spring center pin?

Leaf Spring center pins are a piece of hardware that is finely threaded down its entire length with a round button head at one end. The other end will accept a nut. Also known as leaf spring center bolts, these items perform double duty by holding the spring leaves together and centering the spring pack in the axle housing. The leaf spring center pin will run through holes punched in the center of all the spring leaves. When the spring is assembled the center pin in installed, and the nut torqued. When the spring is installed in a vehicle, the round button head on the center bolt will be used to position the spring in a pocket in the axle. The spring pin head will locate the spring and ensure that the axle will be in alignment.

Leaf Spring Center Pin Installed

Leaf spring center bolt sizes

Leaf spring center bolts come in diameters of 5/16”, 3/8”, 7/16”, and 1⁄2” with lengths of 4”-12”. The size you need will depend on the spring manufacturer and the spring configuration. The length will depend on the total pack thickness that is required to pass through and the diameter varys depending on what size hole the manufacturer punched in the spring leaves.

leaf spring center bolt

When do you need to replace leaf spring center bolts?

For most leaf springs the center pin will never need to be replaced, but there are a few situations that will require the pin to be replaced.

Center bolt breakage due to impact accident – Leaf spring center bolts can break under the right conditions. An accident where the axle is struck can put enough force on the center bolts to break them and allow the axle to shift. In an accident, there may be more damage to contend with than just a broken center bolt, so the entire suspension should be inspected thoroughly.

Center bolt breakage due to loosened U-bolts – Loose leaf spring u-bolts can transfer additional stress to the leaf spring center pins and cause them to break. When this occurs, the leaf spring pack may shift and no longer be in alignment. Leaves may turn and stick out from the leaf pack which was a neat stack before. The axle may cause dog tracking as the centering pin is no longer centered in the axle. In these cases, the center bolt and the U-bolts should be changed.

Adding leaves to spring pack – When adding additional leaves to a spring pack you may need a longer center bolt to tie the entire pack together.

Replacing a leaf – If a leaf has broken you will need to remove the center pin for pack disassembly, and in most cases, the center pin will need to be replaced.

Replacing overload spring – Some overload springs will be tied to the main spring pack using the center bolt. When replacing these upper contact overload leaves the pin should be replaced to ensure its strength.


How to replace leaf spring center pins.

If you need to change your leaf spring center pins, there are some steps that you should follow to make the job easier. Changing the pin can be done in the vehicle most of the time, but in some instances, it may be necessary to remove the entire spring pack.

  1. Align the leaves and clamp the spring pack together using a c-clamp on both ends. The center bolt may be holding a good amount of pressure so ensure these clamps are secure and tight.
  2. Remove pin by loosening the nut or cutting the pin.
  3. Install new pin and tighten the nut
  4. Cut excess threads after the nut
  5. Install new U-bolts and torque to spec.

At Truckspring.com we have been in the business to repairing and replacing leaf springs for over 40 years. If you have any question or need advice call us at 1-800-358-4751 or email us at truckspring@truckspring.com


Leaf Spring Center Bolts Reviews

Out of 2 reviews, the average customer rating for Leaf Spring Center Bolts: 5 out of 5.

Need Help Finding the Right Product?

Our Michigan Based Parts Experts Can Help. Call for immediate assistance.

Please Wait...