The CMCGGA002 3-Pack of Heavy-Duty 1/8" NPT Grease Gun Coupler is used with hydraulic type grease fittings for cordless grease guns with max operating pressure up to 10,000 psi.
What is the CMCGGA002 and what grease guns does it fit?
The CMCGGA002 is a 3-pack of heavy-duty 1/8-inch NPT grease gun couplers designed for use with hydraulic-type Zerk grease fittings. It is compatible with CRAFTSMAN cordless grease guns and rated to 10,000 PSI maximum operating pressure.
Why buy a 3-pack of couplers instead of a single replacement?
Couplers are wear items — the jaw mechanism that locks onto Zerk fittings fatigues under repeated high-pressure cycling. Having spares on hand means a failed coupler mid-job does not stop work. For shops or fleets that grease multiple pieces of equipment regularly, keeping a spare coupler per gun is standard practice.
What is the maximum operating pressure for the CMCGGA002?
The CMCGGA002 is rated at 10,000 PSI maximum. This covers the full output range of CRAFTSMAN cordless grease guns and most manual lever guns. Check your grease gun's rated output — most cordless models operate well within this ceiling.
Are these couplers compatible with grease guns from other brands?
The CMCGGA002 uses a standard 1/8-inch NPT connection, which is the universal thread standard for grease gun couplers. It is compatible with any grease gun that accepts a 1/8-inch NPT coupler, not just CRAFTSMAN tools.
How do you know when a grease gun coupler needs replacing?
Replace the coupler when it no longer locks firmly onto Zerk fittings, when grease leaks from the coupler body under pressure, or when the jaw shows visible wear or cracking. A coupler that releases under pressure or fails to seat means no grease is being delivered — either symptom warrants immediate replacement.
# CRAFTSMAN 1/8-Inch Grease Gun Coupler (3-Pack) **Model:** `CMCGGA002` **Brand:** CRAFTSMAN **Category:** Grease Gun > The CMCGGA002 3-Pack of Heavy-Duty 1/8" NPT Grease Gun Coupler is used with hydraulic type grease fittings for cordless grease guns with max operating pressure up to 10,000 psi. ## Specifications | Attribute | Value | |---|---| | Product Type | LUBRICANT ACCESSORY | | Voltage (V) | 20 | | Cordless / Corded | Cordless | | Power Source | Battery | | Motor Type | Brushed | | Tool Only | No | | Batteries Included | 0 | | Charger Included | No | | Piece Count | 3 | | Barcode (UPC) | 885911908436 | | Country of Origin | China | | Warranty | 3-year limited | ## What's Included - (1) CRAFTSMAN 1/8-Inch Grease Gun Coupler (3-Pack) Source: https://www.jaspecs.com/craftsman/grease-gun/cmcgga002-18-inch-grease-gun-coupler-3-pack/