Sacrificial Zinc Pencil Engine Anodes

These Engine Anodes (also known as pencil zincs) increase the longevity of your engine when installed on your engine block. Our zinc engine anodes protect heat exchangers from corrosion issues.  Coupled with brass plugs, we carry varying sizes from 1/4″ to 1″ NPT (National Pipe Thread).

All of our Pencil Zincs conform to meet highest MIL-Spec standard Mil-Spec 18001, and are manufactured by the world’s finest Boat Zinc supplier Sea Shield Marine.

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    (E-0-Complete) Pencil Zinc Anode 3/8"x 1-3/4" w/ Brass Plug

    -50%
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    (E-0-Complete) Pencil Zinc Anode 3/8″x 1-3/4″ w/ Brass Plug

    Engine Anodes E-0 Pencil Zinc 3/8″x 1-3/4″(E-0-Complete)

    1. Brass Plug NPT Size 1/4″ (National Pipe Thread).
    2. Brass Plug OD Size 1/2″ (Outside Diameter).
    3. Dia x Length 3/8″ x 1-3/4″.
    4. Zinc Thread Size 5/16″ – 18
    $8.00 $4.00
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    (E-0-E-5XL) Replacement Pencil Zinc Engine Anodes (without Brass Plug)

    replacement pencil zinc anode
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    replacement pencil zinc anode
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    (E-0-E-5XL) Replacement Pencil Zinc Engine Anodes (without Brass Plug)

    Replacement Pencil Zinc Anodes (Zinc Only)

    1. Replacement Mil-Spec 1-A-18001 zinc anodes for NPT brass plugs.
    2. Threads are measured by UNC standards.
    3. Made to protect your engine blocks and heat exchangers
    4. Made in USA, by Sea Shield Marine
    $1.80$18.50
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    (E-1-Complete) Pencil Zinc Anodes 1/2"x 2" w/ Brass Plug

    -35%
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    (E-1-Complete) Pencil Zinc Anodes 1/2″x 2″ w/ Brass Plug

    Engine Anodes E-1 Pencil Zinc 1/2″x 2″ (E-1-Complete)

    1. Brass Plug NPT Size 3/8″ (National Pipe Thread).
    2. Brass Plug OD Size 5/8″ (Outside Diameter).
    3. Dia x Length 1/2″ x 2″
    4. Zinc Thread Size 3/8″ – 16
    $9.41 $6.12
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    (E-2-Complete) Pencil Zinc Engine Anodes 5/8"x 2" w/ Brass Plug

    -41%
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    (E-2-Complete) Pencil Zinc Engine Anodes 5/8″x 2″ w/ Brass Plug

    Engine Anodes E-2 Pencil Zinc 5/8″x 2″ (E-2-Complete)

    1. Brass Plug NPT Size 1/2″ (National Pipe Thread).
    2. Brass Plug OD Size 3/4″ (Outside Diameter).
    3. Dia x Length 5/8″ x 2″
    4. Zinc Thread Size 9/16″ – 12
    $16.14 $9.60
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    (E-2X-Complete*) Pencil Zinc Anode 5/8"x3" w/ Brass Plug

    -51%
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    (E-2X-Complete*) Pencil Zinc Anode 5/8″x3″ w/ Brass Plug

    Engine Anodes E-2X Pencil Zinc 5/8″x 3″ (E-2X-Complete*)

    1. Brass Plug NPT Size 1/2″ (National Pipe Thread).
    2. Brass Plug OD Size 3/4″ (Outside Diameter).
    3. Dia x Length 5/8″ x 3″
    4. Zinc Thread Size 9/16″ – 12
    $20.25 $9.90
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    (E-2XL-Complete) Pencil Zinc Engine Anode 5/8"x 6" w/ Brass Plug

    -41%
    0 out of 5

    (E-2XL-Complete) Pencil Zinc Engine Anode 5/8″x 6″ w/ Brass Plug

    Engine Anodes E-2XL Pencil Zinc 5/8″x 6″ (E-2XL-Complete*)

    1. Brass Plug NPT Size 1/2″ (National Pipe Thread).
    2. Brass Plug OD Size 3/4″ (Outside Diameter).
    3. Dia x Length 5/8″ x 6″
    4. Zinc Thread Size 9/16″ – 12
    $23.21 $13.60
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    (E-3-Complete) Pencil Zinc Engine Anode 3/4"x 2" w/ Brass Plug

    -42%
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    (E-3-Complete) Pencil Zinc Engine Anode 3/4″x 2″ w/ Brass Plug

    Engine Anodes E-3 Pencil Zinc 3/4″x 2″ (E-3-Complete)

    1. Brass Plug NPT Size 3/4″ (National Pipe Thread).
    2. Brass Plug OD Size 1″ (Outside Diameter).
    3. Dia x Length 3/4″ x 2″
    4. Zinc Thread Size 1/2″ – 13
    $18.85 $11.00
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    (E-3X-Complete) Pencil Zinc Engine Anode 7/8"x3" w/ Brass Plug

    -48%
    0 out of 5

    (E-3X-Complete) Pencil Zinc Engine Anode 7/8″x3″ w/ Brass Plug

    Engine Anodes E-3X Pencil Zinc 7/8″x3″(E-3X-Complete*)

    1. Brass Plug NPT Size 3/4″ (National Pipe Thread).
    2. Brass Plug OD Size 1″ (Outside Diameter).
    3. Dia x Length 7/8″ x 3″
    4. Zinc Thread Size 13/16″ – 10
    $44.75 $23.40
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    (E-3XL-Complete) Pencil Zinc Engine Anode 7/8"x6" w/ Brass Plug

    -45%
    0 out of 5

    (E-3XL-Complete) Pencil Zinc Engine Anode 7/8″x6″ w/ Brass Plug

    Engine Anodes E-3XL Pencil Zinc 7/8″x6″(E-3XL-Complete*)

    1. Brass Plug NPT Size 3/4″ (National Pipe Thread).
    2. Brass Plug OD Size 1″ (Outside Diameter).
    3. Dia x Length 7/8″ x 6″
    4. Zinc Thread Size 13/16″ – 10
    $51.58 $28.60
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    (E-4 Complete) Pencil Zinc Engine Anode 3/4"x 3-3/8" w/ Brass Plug

    -44%
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    (E-4 Complete) Pencil Zinc Engine Anode 3/4″x 3-3/8″ w/ Brass Plug

    Engine Anodes E-4 Pencil Zinc 3/4″x 3-3/8″ (E-4-Complete)

    1. Brass Plug NPT Size 3/4″ (National Pipe Thread).
    2. Brass Plug OD Size 1″ (Outside Diameter).
    3. Dia x Length 3/4″ x 3-3/8″
    4. Zinc Thread Size 1/2″ – 13
    $21.26 $12.00
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    (E-5X-Complete) Pencil Zinc Engine Anode 1" x 3" w/ Brass Plug

    -39%
    0 out of 5

    (E-5X-Complete) Pencil Zinc Engine Anode 1″ x 3″ w/ Brass Plug

    Engine Anodes E-5X Pencil Zinc 1″x 3″ (E-5X-Complete*)

    1. Brass Plug NPT Size 1″ (National Pipe Thread).
    2. Brass Plug OD Size 1-3/8″ (Outside Diameter).
    3. Dia x Length 1″ x 3″
    4. Zinc Thread Size 1″ – 12
    $37.13 $22.50
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    (E-5XL-Complete) Pencil Zinc Engine Anode 1"x 6" w/ Brass Plug

    -32%
    0 out of 5

    (E-5XL-Complete) Pencil Zinc Engine Anode 1″x 6″ w/ Brass Plug

    Engine Anodes E-5XL Pencil Zinc 1″x 6″ (E-5XL-Complete*)

    1. Brass Plug NPT Size 1″ (National Pipe Thread).
    2. Brass Plug OD Size 1-3/8″ (Outside Diameter).
    3. Dia x Length 1″ x 6″
    4. Zinc Thread Size 1″ – 12
    $43.36 $29.70