Two Pack Gearhead Friendly Compression Tester Adapters M12x1.25 Spark Plug Tool Adapter With O Ring Seal Universal Gauge Fitting For Cars Trucks Motorcycles And Small Engines

Two-Pack M12x1.25 Spark Plug Compression Adapters with O-Ring
✔️ M12x1.25 thread; 1.21 × 0.69 × 0.69 in; 2-pack, iron, gold

These compression tester adapters are M12x1.25 threaded fittings designed to connect a standard compression gauge to spark plug ports in cars, trucks, motorcycles, and small engines. The two-pack gives handy replacements for shop or home diagnostics.

✅ Size: 1.21 × 0.69 × 0.69 in (30.7 × 17.5 × 17.5 mm) overall
✅ Thread: M12x1.25; tight compatibility with standard compression testers
✅ Seal: built-in O-ring for leak-free, accurate readings
✅ Material/Color: iron construction with gold finish
✅ Pack: 2 pieces included in the set

💡 What is a spark plug compression tester adapter used for? This handy device helps connect a compression gauge to spark plug ports for engine health checks. - Works with most standard compression testers - Fits M12x1.25 spark plug ports and tester interfaces - Sealed with O-ring for accurate readings