Spring Bolts

Upgrade or replace your leaf spring bolts and nuts with quality hardware at TruckSpring.com and get the job done right.

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SKU F100812
$12.32

Spring bolt for Peterbilt rear Air Trac suspensions. 8-1/2 inches long with 1 inch - 14 threads.   Details

Typically ships in 7 to 10 business days.
  • Application:Air Trac
  • Batco Number:09-8021
  • Dayton Number:334-458
  • Euclid Number:E1862
  • Flagg Number:B1381-75
  • Peterbilt Number:0301668
  • MPN: F100812
SKU C916412
$4.32

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

20+ In Stock
  • Automann Number:M5112
  • MPN: C916412
SKU C580500
$2.79

Spring bolt, 5 inch length, 5/8-11 inch threads. Fits rear of front spring applications.   Details

20+ In Stock
  • Application:Rear of front. 5 inch length, 5/8-11 inch threads. Use with SLN1011 lock nut.
  • MPN: C580500
SKU B1477-43
$17.09

Spring bolt for Ford F-Series trucks. 140mm length x 18mm diameter with M18-2.5 threads.   Details

20+ In Stock
  • Application:140mm length, M18-2.5 threads with LNC18mm lock nut
  • Dayton Number:334-1937 (kit)
  • Flagg Number:B1477-43
  • Ford Number:N806967S56, N806967S439
  • MPN: B1477-43
SKU C916500
$4.02

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

20+ In Stock
  • Automann Number:C916500GR5, M5108
  • MPN: C916500
SKU C340612
$6.27

3/4 x 6-1/2 inch bolt with SAE 10 course thread. 2.00 inches minimum thread length. Grade 5.   Details

20+ In Stock
  • Diameter:3/4 inch
  • Length:6-1/2 inches
  • Minimum Thread:2.000 inches
  • Thread Size:10
  • Thread Type:Course
  • MPN: C340612
SKU B1487-43
$15.24

Flanged spring bolt for Ford F-Series trucks. Fits rear of front spring applications.   Details

4 In Stock
  • Application:Rear of front. 163mm length, M18-2.5 threads. Use with LNC18MM lock nut.
  • Dayton Number:334-1937 (kit)
  • Flagg Number:B1487-43
  • Ford Number:N807660S100
  • MPN: B1487-43
SKU C340600
$5.89

3/4 x 6 inch bolt with SAE 10 course thread. 2.075 inches minimum thread length. Grade 8.   Details

20+ In Stock
  • Diameter:3/4 inch
  • Length:6 inches
  • Minimum Thread:2.0752 inches
  • Thread Size:10
  • Thread Type:Course
  • MPN: C340600
SKU C916512
$4.33

Leaf spring bolt for Dodge, GM and Ford trucks. 5.5 inch length with 9/16 inch - 12 threads. 1.   Details

8 In Stock
  • MPN: C916512
SKU B1506-43
$8.27

Fanged spring bolt for Ford F-450 and F-550 Super Duty trucks. 130mm length, M16-2.0 threads.   Details

20+ In Stock
  • Application:Rear of rear for F450, F550 Super Duty trucks. 130mm length, M16-2.0 threads.
  • Flagg Number:B1506-43
  • Ford Number:W500593S426, W500593S439
  • Note:Can use FLNC16MMT flanged nut
  • MPN: B1506-43
SKU C340500
$5.30

3/4 x 5 inch bolt with SAE 10 course thread. 2.050 inches minimum thread length. Grade 8.   Details

20+ In Stock
  • Diameter:3/4 inch
  • Length:5 inches
  • Minimum Thread:2.050 inches
  • Thread Size:8
  • Thread Type:Course
  • MPN: C340500
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

17 In Stock
  • Automann Number:M5110
  • Ford Number:433179, 56214S4
  • MPN: C916400

Spring Bolts

Many trucks with lighter suspension capacities will use rubber suspension bushings as a smoother riding alternative to bi-metal bushings and hardened steel pins. On suspensions using rubber bushings, leaf spring bolts are the preferred attachment method. When using a rubber bushing, a greaseable pin is not necessary since there should be little wear on the hardened bolt from the bushing sleeve.

Leaf Spring bolts will be sized correctly for the suspension and the location that they are used in. Spring hardware may be metric or standard-sized despite where the vehicle is produced, and the bolts used in the front of the spring and the rear of the spring and spring shackle assembly will not always be sized the same. Spring bolts will typically be hardened, Grade 5 or 8 for standard sizes, and 8.8-10.9 for metric, and they will be sized appropriately for the suspension system that they are used in. Using a bolt with the incorrect smaller size may leave too much clearance inside the bushing and cause suspension noise and damage, and a bolt that is too large will not fit. Also, using a bolt of the correct length is essential to avoid interference with other suspension components and possible damage.

When changing leaf springs , it is recommended to change all attaching hardware that shows any wear or any hardware that was used with locking nuts. This will ensure that the installation is sound and long-lasting. When installing new bolts, they should always be torqued to the OEM specifications. Reusing worn components can cause alignment issues and premature tire wear. If you are having issues finding the correct spring bolts for your installation please reach out to us at TruckSpring.com or give us a call at 1-800-358-4751, and we will be glad to help you.


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