King Pins

King Pins

The king pins and its components play a vital role in your trucks steering. We have years of installing and shipping steering king pins and all the replacement parts.

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SKU 460.85
$5.62

King pin cap. Replaces Ford numbers 604Z3B290AAFORD, 6C4Z3B290AA and 6O4Z3B290AA and International 2590250C1.   Details

3 In Stock as of October 29, 2020 6:10 PM EST.
  • Automann Number:460.85
  • Dana Number:071SC102, 085SC101
  • Ford Number:604Z3B290AAFORD, 6C4Z3B290AA, 6O4Z3B290AA
  • IHC Number:2590250C1
  • UPC: 889626059544
  • MPN: 460.85
SKU SKS7018
$359.17

No ream spiral steel king pin kit SKS7018 for GMC applications.   Details

Availability: Typically ships in 1 business day.
  • King Pin Type:DD (Opposite Side Draw Key)
  • Application:GM
  • Outside Diameter:1.500 inches
  • Length:7.150 inches
  • Automann Number:460.532C
  • Dallas Number:K872C
  • Dayton Number:300-314
  • Euclid Number:E-11816C
  • Flagg Number:FKP143C
  • GMC Number:88936119
  • Kaiser Number:K70R
  • Meritor Number:R201479
  • Midwest Number:WA11-1418
  • Trayer Number:TK714
  • UCF Number:SKB-714
  • MPN: SKS7018
SKU 70.070.07
$142.59

King pin kit 70.070.07 for International and GMC applications. 1.250 inch outer diameter x 7.880 inch length king pin. T126 thrust bearing.   Details

Availability: Typically ships in 1 business day.
  • King Pin Type:SD (Single Draw Key)
  • Application:GMC
  • Application:International
  • Outside Diameter:1.250 inches
  • Length:7.880 inches
  • Automann Number:460.102B
  • Batco Number:20-2281
  • BWP Number:M-2317
  • Dana Number:2621017, 2921017, 262-1017, 292-1017
  • Dayton Number:300-173
  • Eaton Number:KP2280
  • Euclid Number:E-4443B
  • Flagg Number:FKP39B
  • GMC Number:3927943, 8885857
  • IHC Number:FAK4468
  • Kaiser Number:70.070.07, K70G, 50.070.07
  • Meritor Number:R200025
  • Moog Number:8491B
  • Spicer Number: SP621017, 530-1007
  • MPN: 70.070.07
SKU 300-234
$343.26

King pin kit 300-234 single draw key. 1.810 inch outer diameter x 10.531 inch length king pin. T1880S thrust bearing.   Details

1 In Stock as of October 29, 2020 12:55 PM EST.
  • King Pin Type:SD (Single Draw Key)
  • Outside Diameter:1.810 inches
  • Length:10.531 inches
  • Thrust Bearing:T1880S
  • Automann Number:460.201B
  • Batco Number:20-2620
  • BWP Number:M-2378
  • Dana Number: 262-1577
  • Dayton Number:300-234
  • Eaton Number:KP2334
  • Euclid Number:FKP89B
  • GMC Number:S-7191
  • IHC Number:50.125.23
  • Mack Number:R200067
  • Newstar Number:SP621577
  • Volvo Number:217175
  • MPN: 300-234
SKU 300-303
$343.01

King pin kit 300-303 double draw key. 1.794 inch outer diameter x 9.06 inch length king pin. T182S thrust bearing.   Details

1 In Stock as of October 29, 2020 6:10 PM EST.
  • King Pin Type:DS (Same Side Double Draw Key)
  • Outside Diameter:1.794 inches
  • Length:9.050 inches
  • Thrust Bearing:T182S
  • Automann Number:460.524B
  • Dallas Number:K867
  • Dayton Number:300-303
  • Eaton Number:328346, ETN328346
  • Flagg Number:FKP139B
  • Kaiser Number:K123E
  • Newstar Number:S-13980
  • Trayer Number:TK718
  • UCF Number:SKB-718
  • UPC: 889626060793
  • MPN: 300-303
SKU 300-305
$354.09

King pin kit 300-305 double draw key. 1.873 inch outer diameter x 9.06 inch length king pin. T188S thrust bearing. Replaces International FAK5507.   Details

4 In Stock as of October 29, 2020 12:56 PM EST.
  • King Pin Type:DS (Same Side Double Draw Key)
  • Outside Diameter:1.873 inches
  • Length:9.070 inches
  • Thrust Bearing:T188S
  • Automann Number:460.534B
  • Dallas Number:K868
  • Dayton Number:300-305
  • Eaton Number:328347, ETN328347
  • Elgin Number:KB868
  • Flagg Number:FKP144B
  • IHC Number:FAK5507
  • Kaiser Number:K147E
  • Newstar Number:S-13982
  • Trayer Number:TK717
  • UCF Number:SKB-717
  • UPC: 889626060908
  • MPN: 300-305
SKU 300-308
$387.99

King pin kit 300-308 single draw key. 1.873 inch outer diameter x 9.06 inch length king pin. T188S thrust bearing .937 inch thick.   Details

1 In Stock as of October 29, 2020 6:10 PM EST.
  • King Pin Type:SD (Single Draw Key)
  • Outside Diameter:1.873 inches
  • Length:9.050 inches
  • Thrust Bearing:T188S
  • Automann Number:460.527C
  • Dana Number:328345
  • Dayton Number:300-308
  • Eaton Number:ETN328345
  • Newstar Number:S-13976
  • UCF Number:SKB-719
  • UPC: 889626060847
  • MPN: 300-308
SKU 300-310
$380.92

King pin kit 300-310 opposite side draw key. 1.999 inch outer diameter x 11.210 inch length king pin. Thrust bearing T208S.   Details

1 In Stock as of October 29, 2020 12:56 PM EST.
  • King Pin Type:DD (Opposite Side Draw Key)
  • Outside Diameter:1.999 inches
  • Length:11.210 inches
  • Thrust Bearing:T208S
  • Automann Number:460.528C
  • Dallas Number:K875C
  • Dayton Number:300-310
  • Euclid Number: E-11813C
  • Flagg Number:FKP141C
  • IHC Number:2505495C
  • Meritor Number:R201475, R201607
  • Trayer Number:TK664
  • UCF Number:SKB-664
  • MPN: 300-310
SKU 300-314
$293.67

King pin kit 300-314 opposite side draw key. 1.498 inch outer diameter x 7.153 inch length king pin. T1490S thrust bearing. For MFS07 axle.   Details

2 In Stock as of October 29, 2020 12:55 PM EST.
  • King Pin Type:DD (Opposite Side Draw Key)
  • Outside Diameter:1.498 inches
  • Length:7.153 inches
  • Thrust Bearing:T1490S
  • Automann Number:460.532C
  • Chevrolet / GM Number:88936119
  • Dallas Number:K872C
  • Euclid Number:E-11816C
  • Flagg Number:FKP143C
  • Kaiser Number:K70R
  • Meritor Number:R201479
  • Midwest Number:WA11-1418
  • Trayer Number:TK714
  • UCF Number:SKB-714
  • MPN: 300-314
SKU 300-318
$225.00

King pin kit 300-318 double draw key. 1.359 inch outer diameter x 8.07 inch length king pin. T139S thrust bearing.   Details

1 In Stock as of October 29, 2020 6:10 PM EST.
  • King Pin Type:DS (Same Side Double Draw Key)
  • Application:Ford
  • Outside Diameter:1.359 inches
  • Length:8.070 inches
  • Thrust Bearing:T139S
  • Automann Number:460.536B
  • Dallas Number:K874
  • Dayton Number:300-318
  • Kaiser Number:50.103.19, 70.103.19
  • UPC: 889626060939
  • MPN: 300-318
SKU 300-325
$331.24

King pin kit 300-325 single draw key. 1.873 inch outer diameter x 9.97 inch length king pin. T189S thrust bearing.   Details

2 In Stock as of October 29, 2020 6:10 PM EST.
  • King Pin Type:SD (Single Draw Key)
  • Outside Diameter:1.873 inches
  • Length:9.970 inches
  • Thrust Bearing:T189S
  • Automann Number:460.243B
  • Dallas Number:K866
  • Dana Number:329434
  • Dayton Number:300-325
  • Eaton Number:329434
  • Elgin Number:KB866
  • Newstar Number:S-13979
  • UPC: 889626060267
  • MPN: 300-325
SKU 300-342
$283.34

King pin kit 300-342 double draw key. 2.046 inch outer diameter x 10.06 inch length king pin. T208S thrust bearing   Details

1 In Stock as of October 29, 2020 6:10 PM EST.
  • King Pin Type:DS (Same Side Double Draw Key)
  • Outside Diameter:2.046 inches
  • Length:10.060 inches
  • Thrust Bearing:T208S
  • Automann Number:460.505C
  • Dana Number:331435
  • Dayton Number:300-342
  • UPC: 889626060670
  • MPN: 300-342

What is a Truck King Pin?

King Pins are the connection between your steer axle and the steering knuckle on heavy-duty, medium-duty, and older light-duty trucks with a straight axle. The king pins themselves are large, hardened steel pins that are centered in the axle beam. The king pins protrude out of the axle on the top and bottom where the steering knuckle wraps around the axle and king pin. The steering knuckle contains bi-metal bushings which wrap around the king pins and maintain a tight clearance to prevent steering play. The king pins and bushings manage a large amount of force while holding the knuckle in correct alignment.


What causes King pin wear?

King pin wear will occur from a lack of maintenance or physical damage from a collision. In an ideal scenario, the king pin and the bushings will never make contact and a fine film of grease will act as a protective layer. If the wrong type of grease is used or if the king pins are not greased often enough the protective layer will break down and the softer bronze of the bushing will begin to wear away. An impact from a collision could also force the grease out and cause king pin to bushing contact but most likely other damage would keep the truck from operation and the loose king pin and bushings would be replaced during the accident repairs.

King pin and bushing wear will be noticeable as problems in the steering system since the steering knuckle is not being held in the correct alignment angles. Normally this will present itself as tire wear and a pull. The pull may be described as a wander because the camber and caster are able to freely change within the wear on the king pin and bushings. If there is a 1/8” of play at the king pin this can translate to many degrees of change in camber and caster settings that can vary with the road or steering direction. With proper maintenance, you may never need to replace king pins and bushings, but for most trucks, king pins will need to be replaced at least once in their lives.


Types of King Pin Kits

Performing a king pin rebush job is a major undertaking so it is best to be prepared for the task with a replacement king pin kit. There are two main options for king pin kits to accomplish the job of replacement.

Spiral bushing kits

Spiral bushing kits use a coiled, spiral-shaped bushing. These bushings can be installed by twisting into the spindle using an installation tool and they do not require reaming. Spiral kits are the ideal kit to use if you do not have the capability to press new bushing into the steering knuckles and ream them to fit the pins. You can avoid a machine shop using a spiral bushing kit so if you are servicing your own truck this is the kit to use.

Standard King Pin kits

Standard king pin kits use solid bi-metal bronze and steel bushings. Steel is used for the outer portion of the bushing to allow it to be pressed into the steering knuckle without deforming the inner bronze area. Bronze is used on the inside portion of the bushing due to its anti-friction and wear-resistant properties, bronze will only become damaged if lubrication is not present. The bushings included in a standard king pin kit will need to be reamed to fit the new pin after they are installed in the steering knuckle. Standard king pin kits are typically used by shops since special tools are required to line bore the bushings in the steering knuckle. If you are self-installing, it will require the assistance of a machine shop to fit the pins to the steering knuckle.

King pin kit components

King pin kits are specific for each axle model and the kits will include all necessary components to refurbish the axle and steering knuckle. Most king pin kits will include the following items:

  • King pins – Large Hardened steel pins. These may be a single or double keeper (using one or two keeper bolts) The diameter and length of the pin are critical to finding the correct replacement kit. King pins are machined to fine tolerances to fit the axle precisely.
  • Steering Knuckle bushings – Bushings will be included that are installed in the steering knuckle. There will be four bushings, two for each spindle. The type of kit that you have purchased will dictate whether you have spiral bushings or standard bi-metal bushings.
  • Caps – King pin caps will be included when needed. The caps install in the top and bottom of the spindle and seal in grease while providing threads to install a grease zirc.
  • Seals – Seals install at the top and bottom of the king pin to retain the grease. It is important to install the seal in the correct direction to allow the grease to flow through the bushings. Incorrectly installing the seals may block grease from reaching the bushings.
  • Shims – Shims are used to control play between the steering knuckle and the axle. Shims will be used on the top of the axle between the spindle and the axle. Truck manufacturers will have specifications for each model on how much travel is allowable and shims will be added or removed to meet this specification.
  • Keeper – Keepers are bolts that have a wedge-shaped head and retain the king pins in the axle. As the bolt is tightened the wedge squares the king pin against the axle.
  • Thrust bearings – Thrust bearings are roller bearings that sit at the bottom of the axle against the steering knuckle. The weight on the axle rests on these bearings. Thrust bearings should be pre-packed before you install them to ensure proper lubrication.

Axle damage

In some situations, the axle itself can become damaged and the axle will no longer fit the king pin tightly. If a new pin is installed and it is loose, it will continue to damage the axle over time. Using the truck with a loose king pin to axle connection will cause the same alignment issues and tire wear that loose knuckle bushings will. Ignoring a king pin that is loose in the axle may lead to the entire axle needing to be replaced. If the damage is noticed early enough a shop with the correct tools can bore and re-sleeve the axle. There are oversized bushings that can be installed in the axle that allow you to bore the axle to fit the larger bushing and an original sized pin. This is a specialized job and not all shops will be able to complete it in house.

Both types of king pin kits are complete and will contain all the parts required to complete the install. There are several special tools required for either type of king pin kit, so it is important to keep this in mind before starting the work. If you have questions about a king pin install or need help locating a kit we can help, we have years of experience installing king pin kits, line-boring spindles, and machining axles. Please reach out to us at TruckSpring.com or call us at 1-800-358-4751 and we will be glad to help.


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