PQY Universal Spark Plug Gap Gapping Tool with 32 Blade

The PQY Universal Spark Plug Gap Gapping Tool is a compact aluminum gauge and adjuster with a 32-blade feeler set for accurately setting most standard spark plug gaps.

This precision tool combines a durable matte-anodized aluminum gapper and a 32-blade manganese-steel feeler gauge to let hobbyists and pros set electrode spacing quickly and consistently. It’s built to work with the majority of common spark plug thread sizes (14mm, 12mm, 10mm, 16mm) and includes a brass blade for electronic-ignition plugs. The compact, manual design requires no batteries and is ideal for workshop benches, mobile tool kits, and trackside tuning.

How do I use the PQY gap tool to set a spark plug gap?

Set the plug on the tool’s seating post, select the feeler blade that matches your target gap, then turn the adjustment knob slowly until the electrode meets the blade thickness. Check the gap with the blade inserted; if the electrode springs back, repeat using a slightly thinner blade and re-check.

• Seat plug on the correct diameter post for secure hold.
• Insert matching feeler blade and rotate knob until snug.
• Re-measure; if electrode springs back, use a 0.02–0.03mm thinner blade.
• Includes a 0.25mm brass blade for electronic-ignition systems.

Which spark plugs fit this PQY gapping tool?

The PQY tool accommodates most standard thread spark plugs in 14mm, 12mm, 10mm, and 16mm sizes. It is not designed for 18mm-thread plugs, nor is it suitable for specialized long-reach or short-reach plugs — always confirm your plug’s thread and reach before using.

• Compatible: 14mm, 12mm, 10mm, 16mm standard-thread plugs.
• Not compatible: 18mm thread, long-reach, or short-reach plugs.
• Check plug reach and thread size against the tool before purchase.

What accuracy and blade sizes are included with the feeler gauge?

The included 32-blade feeler set spans from 0.04mm (0.0015") to 0.88mm (0.035"), allowing fine increments for precise gap adjustment. Blades are manganese steel for wear resistance, and a dedicated 0.25mm (0.010") brass blade is provided to avoid electrical interference when setting gaps on electronic ignition plugs.

• Range: 0.04mm to 0.88mm for common automotive needs.
• Material: manganese-steel blades for long life and stable thickness.
• Brass 0.25mm blade included for electronic ignition compatibility.

Who is this for? The PQY Universal Spark Plug Gap Gapping Tool is made for car and motorcycle enthusiasts, home mechanics, and professional tuners who need a reliable, portable method to set spark plug gaps accurately. It’s especially useful when swapping plugs in the garage, preparing race engines, or performing roadside tune-ups — as long as the plugs are standard-length threads (not 18mm, long-reach, or short-reach types). With sturdy aluminum construction and a broad range of feeler sizes, it delivers repeatable results without complex equipment.