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OEM Style Square Plugs and Zinc Anodes for
Caterpillar Marine Engines

The anodes below are for Caterpillar marine engines that prefer to use OEM style Square plugs and zinc anodes.  If your engine uses Hex plugs, click here.

For a list of various Caterpillar engine anode configurations see below:

  • Caterpillar C7 Engine Anodes (pdf)
  • Caterpillar C9 Engine Anodes (pdf)
  • Caterpillar C12 Engine Anodes (pdf)
  • Caterpillar C18 Engine Anodes (pdf)
  • Caterpillar C30 Engine Anodes (pdf)
  • Caterpillar C32 Engine Anodes (pdf)
  • Caterpillar 3196 Engine Anodes (pdf)
  • Caterpillar 3208 Engine Anodes (pdf)
  • Caterpillar 3306 Engine Anodes (pdf)
  • Caterpillar 3406E Engine Anodes (pdf)
No UPC Labels on our
Engine Anodes: Learn More!

Mil-Spec A-18001K Zinc Alloy
The square plugs and zincs shown below are the OEM equivalent. NPT explained.
Square Plugs and Zinc Anodes

6L2282 1/4" NPT Caterpillar Square Plug

6L2279 3/8" NPT Caterpillar Square Plug
6L2282 1/4" NPT Caterpillar Square Plug List Price: $7.99
Our Price: $5.07
PRODUCT SPECS

6L2282 1/4" NPT Caterpillar Square Plug
6L2279 3/8" NPT Caterpillar Square Plug List Price: $11.99
Our Price: $8.15
PRODUCT SPECS

6L2279 3/8" NPT Caterpillar Square Plug
5B9169 1/2" NPT Caterpillar Square Plug 6L2286 1-1/4" NPT Caterpillar Square Plug
5B9169 1/2" NPT Caterpillar Square Plug List Price: $9.99
Our Price: $7.06
PRODUCT SPECS

5B9169 1/2" NPT Caterpillar Square Plug
6L2286 1-1/4" NPT Caterpillar Square Plug List Price: $39.99
Our Price: $17.83
PRODUCT SPECS

6L2286 1-1/4" NPT Caterpillar Square Plug
6L2280 Caterpillar Engine Zinc Anode (E-0HZ) 6L2283 Caterpillar Engine Zinc Anode
6L2280 Caterpillar Engine Zinc Anode (E-0HZ)(Zinc Only) List Price: $3.99
Our Price: $2.35
PRODUCT SPECS

6L2280 Caterpillar Engine Zinc Anode (E-0HZ) (Zinc Only)
6L2283 Caterpillar Engine Zinc Anode (Zinc Only) List Price: $7.99
Our Price: $2.36
PRODUCT SPECS

6L2283 Caterpillar Engine Zinc Anode (Zinc Only)
5B9651 Caterpillar Engine Zinc Anode 6L2288 Caterpillar Engine Zinc Anode
5B9651 Caterpillar Engine Zinc Anode (Zinc Only) List Price: $7.99
Our Price: $4.37
PRODUCT SPECS

5B9651 Caterpillar Engine Zinc Anode (Zinc Only)
6L2288 Caterpillar Engine Zinc Anode (Zinc Only) List Price: $7.99
Our Price: $3.76
PRODUCT SPECS

6L2288 Caterpillar Engine Zinc Anode (Zinc Only)
6L2289 Caterpillar Engine Zinc Anode 6L3104 Caterpillar Engine Zinc Anode (E-0CZ)
6L2289 Caterpillar Engine Zinc Anode (Zinc Only) List Price: $7.99
Our Price: $4.18
PRODUCT SPECS

6L2289 Caterpillar Engine Zinc Anode  (Zinc Only)
6L3104 Caterpillar Engine Zinc Anode (E-0CZ)  (Zinc Only) List Price: $7.99
Our Price: $2.83
PRODUCT SPECS

6L3104 Caterpillar Engine Zinc Anode (E-0CZ)  (Zinc Only)
6L2284 Caterpillar Engine Zinc Anode (E-8Z) 114-9096 Stainless Steel Hex Plug with O-Ring
6L2284 Caterpillar Engine Zinc Anode (E-8Z) List Price: $19.99
Our Price: $8.85
PRODUCT SPECS

6L2284 Caterpillar Engine Zinc Anode (E-8Z)
114-9096 Stainless Steel Hex Plug with O-Ring List Price: $14.79
Our Price: $8.72
PRODUCT SPECS

114-9096 Stainless Steel Hex Plug with O-Ring
Part Number Variations: Caterpillar, 3116, 3126, C9, C12, C18, C30, C32, 3196, 3208, 3306, 3406E, 6L2282, 6L2279, 5B9169, 6L2286, 6L2280, 6L2283, 5B9651, 6L2288, 6L2289, 6L3104, 6L2284, 114-9096