HOLLAND ‘L’ Series

The HOLLAND ‘L’ Square Spool Series Kingpins are for OEM and aftermarket replacement, and are offered in American Association of Railroads (AAR) models. 

Technical data



Material: AISI 4320H and 4718H 
Hardness: 380-420 BHN
Quality: 100% inspected for internal and external integrity


Product information

The HOLLAND ‘L’ Series Kingpin when properly installed, meets or exceeds the performance requirements of the AAR standard M-931, Truck and Trailer Manufacturers Association (TTMA) and the Society of Automotive Engineers (SAE).  

The ‘L’ Series Kingpin features: 

  • High impact resistance 

  • Maximum wear resistance 

  • Optimum strength and fatigue resistance 

  • Ease of installation 

Recommended use


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HOLLAND Kingpins Brochure
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Kingpins Sales Literature
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