Engine Adjuster Screw | 3/8"-12 Acme Lead Screw for QM Slider Plates

The engine adjuster screw is the working piece of your slider plate. Turn it, and the engine walks forward or back to set chain tension. This is the replacement 3/8"-12 Acme lead screw in carbon steel, built to handle the clamping load and constant adjustment that a standard threaded rod would strip out in a season. Acme threads are the trapezoidal profile designed exactly for this kind of job, which is why every quality slider plate uses one.

Fits Ultimate QM Xwing, Arc, and RSR engine slider plates, plus Zero Error engine slider plates. If your adjuster is galled, bent from a hard hit, or the threads are chewed up from running without grease, swap it out before it fails between heats. Pair it with a fresh 3/8"-12 Acme jam nut for a complete rebuild.

Key Specs

• Thread: 3/8"-12 Acme
• Material: Carbon steel
• Function: Engine position adjustment, chain tension
• Fits: Ultimate QM Xwing, Arc, RSR slider plates; Zero Error engine slider plates