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Automann · Suspension & Steering
M5308
In stock · ships from Knoxville
This is a heavy-duty spring pin (shackle pin) for the leaf springs on many Peterbilt and Kenworth trucks.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 4 applications
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All confirmed applications for this part number.
Kenworth
Peterbilt
Kenworth
Peterbilt
Requires 4.0″ wide spring packs. Not interchangeable with M5306 (which fits narrower springs). Always verify dimensions: 1.25″ diameter, roughly 6.86″ overall length, and about 5.32″ between the retaining grooves.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 16 of 16.
Different year, make, or config? Get a confirmation against your truck in under a minute.
It slides through the eye of the leaf spring and secures it to the frame or axle, allowing the spring to pivot as the suspension moves. Over time, these pins can wear out, leading to clunking noises or loose steering, so you replace them to restore tight suspension and proper alignment. The M5308 is designed for 4-inch-wide spring packs and is the correct upgrade from the earlier M5306 for wider springs.
Part Number: M5308
SPRING PIN, PETERBILT/KENWORTH
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside suspension & steering
