2006 - 2021 Kenworth & Peterbilt T400-T880, W900B-W990 And 357-587 Front Leaf Spring - 3 Leaves - 59-594

*Diagram Spring May Differ From Actual Spring* Number of Leaves - 3 (PD/3) Leaf Spring Width - 4" A - Leaf Spring Length: 27-1/4" B - Leaf Spring Length: 32-3/16" C - Leaf Spring Arch: 5-1/4" D - Leaf Spring Pack Thickness: 3-5/8" Leaf Spring Capacity: 10,000 lbs. Leaf Spring OEM Number: B81-6018-003 Leaf Spring Eye Threaded Bushings: Front TB-81 / Rear TB-81 Leaf Spring Material: PD/512 3/984 Full Taper Location - Front   Verify the OEM part number and measurements to confirm compatibility before purchasing. Need help? Visit: How to Identify a Leaf Spring.   Leaf spring 59-594 is the front leaf spring on Kenworth W900B, W900L, W990, T400, T440, T450, T470, T600, T660, T680, T800 and T880. Also fits Peterbilt 365, 367, 388, 389, 567 and 587. The spring is 4" wide, is a 3 leaf spring with 1 pad and has a capacity of 10,000 lbs. The OEM part number is B81-6018-003. Fits 14,600 lb through 24,000 lb axles only. Models with eyes both ends type springs. Springs in the same OEM number seri