Spring Pins

We stock leaf spring pins for just about every type of semi truck and trailer. We have years of experience selling and installing replacement spring pins. Feel free to call us at 800-358-4751 if you need help finding the correct parts for your leaf springs.

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SKU B1397-55

$17.55

Spring Pin | International | Rear of Front

Spring pin B1397-55 for International spring applications. Details

Typically ships in 3 to 4 business days.

Application:International
Spring Pin Type:Smooth
Diameter:1.000 inch
Length:5.563 inches
Center-To-Center:3.906 inches
Automann Number:M5262
Dayton Number:327-295
Flagg Number:B1397-55
Gaumers Number:21397
International Number:468706C2
Note:Included in MIS1416 shackle kit
MPN: B1397-55

SKU M5449

$32.04

Threaded Spring Pin | Kenworth

Kenworth, Peterbilt threaded spring pin. Use with MTB186 threaded bushing. 1.062 inch diameter, 7. Details

20+ In Stock as of July 26, 2021 7:33 AM EST.

Application:Kenworth
Application:Peterbilt
Spring Pin Type:Threaded
Diameter:1.062 inches
Length:7.870 inches
Thread Size:M33.5-4
Center-To-Center:6.330 inches
Dayton Number:327-540
Kenworth Number:B651008, B65-1008, PB641008, PB64-1008
Note:Use with MTB186 threaded bushing
MPN: M5449

SKU B1400-55

$23.76

Spring Pin | International | Threaded | Front and Rear of Front

Threaded spring pin B1400-55 fits International front and rear of front spring applications. Details

20+ In Stock as of July 26, 2021 7:30 AM EST.

Application:International
Spring Pin Type:Threaded
Diameter:1.000 inches
Length:7.375 inches
Thread Size:1-3/8 inch -6
Center-To-Center:5.750 inches
Automann Number:M5268
Dayton Number:327-443
Flagg Number:B1400-55
Gaumers Number:21400
International Number:507203C1, 507203C2
Note:Use with MTB76 threaded bushing. Included in MIS1436, MIS1456 and MIS1476 shackle kits
MPN: B1400-55

SKU 43146H-000

$14.25

Spring Pin | Hendrickson | Rear | Helical

Helical groove spring pin 43146H-000 for Hendrickson applications. 6.875 inch length, 1. Details

20+ In Stock as of July 26, 2021 7:30 AM EST.

Application:Hendrickson
Spring Pin Type:Helical
Location:Rear
Diameter:1.375 inches
Length:6.875 inches
Center-To-Center:5.375 inches
Automann Number:M5240H
Batco Number:09-5673
Dayton Number:327-43
Euclid Number:E3761
Flagg Number:B1386-50
Gaumers Number:21386
Hendrickson Number:43146, 43146000, 43146000L
Meritor Number:R303761
Midland Number:CS70632B
Note:For Spring Pin without Groove Use 43146-000L
MPN: 43146H-000

SKU B1311-43

$13.40

Spring Pin | Ford | Front of Front

Spring pin B1311-43 for front spring front. Fits Ford C-L-CLT-L-LNT-LT-LTS series. 6. Details

15 In Stock as of July 26, 2021 7:30 AM EST.

Application:Ford
Spring Pin Type:Smooth
Diameter:1.000 inch
Length:6.750 inches
Center-To-Center:5.156 inches
Dayton Number:327-209
Flagg Number:B1311-43
Ford Number:D0HZ5780E, E5HZ5780B
Gaumers Number:21311
MPN: B1311-43

SKU B1446-59

$26.67

Spring Pin | Kenworth | Threaded | Front of Front

Threaded spring pin B1446-59 fits Kenworth front of front spring applications. 4.0 inch spring. Details

8 In Stock as of July 26, 2021 7:30 AM EST.

Application:Kenworth
Spring Pin Type:Threaded
Diameter:1.500 inches
Length:7.375 inches
Thread Size:1-3/8 inch -6
Center-To-Center:5.750 inches
Automann Number:M5360
Dayton Number:327-297
Flagg Number:B1446-59
Kenworth Number:6262, 6262KW, 0201713
Note:Similar to shackle pin M4910
MPN: B1446-59

SKU M5297

$80.22

Spring Pin | KME | Rear of Front

Spring pin M5297 for rear of front spring. 5.875 inch length x 1 inch diameter, 4. Details

6 In Stock as of July 26, 2021 7:30 AM EST.

Application:KME
Spring Pin Type:Smooth
Diameter:1.000 inch
Length:5.875 inches
Center-To-Center:4.520 inches
Automann Number:M5297
KME Number:023658F, 071295V
Pierce Number:400190, 40-0190, 409259, 40-9259, 409529, 40-9529, 1006380
UPC: 889626122248
MPN: M5297

SKU 32277H-K

$36.15

Spring Pin Mounting Kit | Hendrickson | Single Keeper Pin | Grooved

Hendrickson single keeper grooved spring pin mounting kit 32277-K. Details

9 In Stock as of July 26, 2021 7:30 AM EST.

Application:Hendrickson
Spring Pin Type:Grooved
Diameter:1.375 inches
Length:7.312 inches
Automann Number:M5224
Batco Number:09-5671
Dayton Number:3274-107
Euclid Number:E1818
Flagg Number:B1378-50
Gaumers Number:21378
Hendrickson Number:13938, 13938000, 32277, 32277000
Meritor Number:R301818
Midland Number:CS66665B
MPN: 32277H-K

SKU 32276-K

$29.75

Spring Pin Mounting Kit | Hendrickson

Hendrickson spring pin mounting kit 32276-K. Details

2 In Stock as of July 26, 2021 7:30 AM EST.

Application:Hendrickson
Spring Pin Type:Smooth
Diameter:1.250 inches
Length:7.312 inches
MPN: 32276-K

SKU 32277H-000

$18.39

Spring Pin | Hendrickson | Rear | Helical Groove

Helical groove spring pin 32277H000 for Hendrickson applications. Uses MLP4586 lock pin. 7. Details

20+ In Stock as of July 26, 2021 7:30 AM EST.

Application:Hendrickson
Spring Pin Type:Helical
Location:Rear
Diameter:1.375 inches
Length:7.312 inches
Automann Number:M5224H
Batco Number:09-5671
Dayton Number:3274-107
Euclid Number:E1818, E-1818
Flagg Number:B1378-50
Gaumers Number:21378
Hendrickson Number:13938, 13938000, 13938-000, 32277, 32277000, 32277-000, 32277000L, 32277-000L
Meritor Number:R301818
Midland Number:CS66665B
MPN: 32277H-000

SKU 43146-K

$40.65

Spring Pin Mounting Kit | Hendrickson | Double Keeper Pin

Hendrickson double keeper spring pin mounting kit 43146-K. Details

16 In Stock as of July 26, 2021 7:30 AM EST.

Spring Pin Type:Smooth
Location:Front of Rear
Diameter:1.375 inches
Length:6.900 inches
Center-To-Center:5.375 inches
Automann Number:M5240
Batco Number:09-5673
Dayton Number:327-437
Euclid Number:E3761
Flagg Number:B1386-50
Ford Number:E3HT5780BA, E3HZ5780A
Gaumers Number:21386
Hendrickson Number:43146, 43146000, 43146000L
International Number:1611848C1
Meritor Number:R303761
Midland Number:CS70632B
Volvo Number:3082223
MPN: 43146-K

SKU B1408-46

$17.96

Spring Pin | Freightliner | Front of Front

Spring pin B1408-46 fits Freightliner front of front spring applications. 4.0 inch spring width. 1. Details

13 In Stock as of July 26, 2021 7:30 AM EST.

Application:Freightliner
Spring Pin Type:Smooth
Diameter:1.250 inches
Length:6.906 inches
Center-To-Center:5.375 inches
Automann Number:M5284
Dayton Number:327-487
Euclid Number:E8796
Flagg Number:B1408-46
Freightliner Number:1612373000, 16-12373-000
Gaumers Number:21408
Meritor Number:R308796
MPN: B1408-46

What is a leaf spring pin?

A spring pin is the pivot and attachment point used on many leaf spring suspensions using brass bushings. The spring pin will be made of hardened steel, and it may be smooth sided or threaded. Spring pins will be drilled and tapped for grease zircs and may have channels in the body to more effectively deliver grease to the spring bushings. Leaf spring pins may have notches cut into them where bolts are used to lock them into place and keep them centered.

Leaf Spring pin types

Smooth Pins – Will be smooth down the body of the pin. Smooth spring pins will normally have one or two notches used to center the pin in the spring hanger and hold it into place. Some suspensions will require shimming to keep the spring centered on the pin during sideloading as there may be gaps between the spring and the frame hanger.

Threaded Pins – Coarsely threaded like a large bolt, threaded pins will be used in threaded type spring bushings. Threaded spring pins may have the threaded area only in the center of the pin, or it may be down the length of the pin body. Threaded pins are used to help with spring movement due to side loading.

Why should you replace leaf spring pins?

With the correct preventative maintenance, spring pins should last the life of the spring. With adequate grease, they can provide years of reliable use. When proper maintenance is skipped, the pins can wear or bind bringing an early need for replacement. When changing springs, it is always recommended to change the pins as the bushings, and the pins will wear together and re-using spring pins may cause your spring bushings to wear out rapidly. Lack of grease can cause damage to the spring and hanger bushings and may require replacement of the bushings or hangers as well as the pins. In severe cases, a spring pin can bind so badly in the bushing that the spring may break from the extra stress.

Damaged Spring Pins Pictured

Measuring Leaf spring pins for replacement and identification

When replacing leaf spring pins, it is important to measure your old pins correctly to ensure a matching replacement can be ordered. Below you will find the information you should obtain before looking for replacement pins:

Vehicle application – Knowing the application will be necessary for threaded pins as there are no normal means of identifying the thread size and pitch used. The threads for threaded spring pins exceed what will normally be found on typical thread gauges for size and thread pitch. The application can also help narrow down pins that may be similar in dimension.
Pin diameter – Measure the diameter of the body of the pin where it will contact the spring bushing. If the pin in severely worn, it may be necessary to use information from the lead spring to order replacement pins. If the diameter of the pin changes on one or both ends also note that dimension.
Pin length – Measure the total length of the pin from end to end.
Distance between locking notches – If the pin had locking notched cut into it measure the center to center distance between the two. If only one notch is used, measure the distance between the center of the notch and the closest end of the pin.
Locking mechanism type – Spring pins with lock notches will use bolts, square keepers, or cotter pins. Identify the type used on your suspension setup and take note.
Grease zirc locations – Due to limited access some spring pins may have more than one grease zirc or multiple threaded holes for grease zircs. This will be important to ensure you can service the spring pin after the installation is done.