Best Overall
Lincoln Industrial 5803 Hydraulic Coupler
Lincoln Industrial
Lincoln is the original grease equipment manufacturer - OEM coupler used in their own guns
- Heavy duty
- 1/8 NPT thread
- All-steel construction
- Rated to 10,000 PSI
Pros
- Lincoln is the original grease equipment manufacturer - OEM coupler used in their own guns
- All-steel construction - no plastic components in the pressure path
- 10,000 PSI pressure rating - no risk of failure at maximum grease gun pressure
- Ball-and-socket grip mechanism provides secure attachment to standard zerk fittings
Cons
- No flexible jaw for misaligned fittings
- Must be pulled straight off - difficult to remove from deeply recessed fittings
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