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Transparent Lincoln G904 grease fitting tool with knurled body and threaded tip

Lincoln

Lincoln G904 Grease Fitting Tool Transparent

SKU CH-5GCD-DTMD5

A transparent Zerk extractor repairs 1/4 in.-28 damaged threads and removes 3/8 in. and 5/16 in. hex, straight or angle fittings

  • ColorTransparent
  • Repairs damaged 1/4-28 threads for reliable grease fittings
  • Removes both 3/8 in and 5/16 in hex fittings
  • Works with straight, angle and hex fitting types
  • Transparent body allows visual confirmation during use
  • Lincoln Industrial brand trusted for professional lubrication tools

Grease Fitting Repair Tool

The Lincoln G904 is a transparent Zerk extractor designed for mechanics and maintenance technicians who service lubrication points. It targets damaged 1/4 inch-28 threads on angle, hex and straight fittings, letting users restore function without replacing the entire fitting.

Thread Repair and Removal Capability

The tool performs two distinct jobs: it taps new threads into stripped 1/4 inch-28 ports and it grips both 3/8 inch and 5/16 inch hex fittings for removal. This dual function means a single instrument handles the repair cycle on compatible grease zerks, reducing the number of specialty tools a technician must carry.

1/4 Inch-28 Thread Compatibility

The extractor only works on zerks with a 1/4 inch-28 thread pitch, so it will not fit metric or larger imperial lubrication ports. Buyers who need to service fittings with different thread specifications must select a different tool.

Highlights

  • Repairs damaged 1/4-28 threads for reliable grease fittings
  • Removes both 3/8 in and 5/16 in hex fittings
  • Works with straight, angle and hex fitting types
  • Transparent body allows visual confirmation during use
  • Lincoln Industrial brand trusted for professional lubrication tools

Specifications

ColorTransparent
BrandLINCOLN INDUSTRIAL

Questions about this item

Will the 1/4 in.-28 tap need replacing after repeated thread repairs?

The tap is hardened steel and sized for 1/4 in.-28 threads; it wears slowly, but heavy daily use on damaged zerks will eventually dull the cutting edges.

What stops me from using the extractor continuously on seized fittings?

The 3/8 in. and 5/16 in. hex sockets grip straight, angle, and hex fittings, but high torque on badly corroded joints can round the socket corners.

Does the transparent body get hot or slippery during all-day shop use?

The clear polymer housing stays near ambient temperature and resists grease buildup, so grip and visibility remain consistent through a full shift.

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