Dorman 579-042 Fuel Tank Sending Unit Lock Ring

OE Quality 60-Day Returns

Dorman 579-042 Fuel Tank Sending Unit Lock Ring - view 1

Dorman 579-042 Fuel Tank Sending Unit Lock Ring - view 2

Dorman 579-042 Fuel Tank Sending Unit Lock Ring - view 3

Dorman 579-042 Fuel Tank Sending Unit Lock Ring - view 4

Dorman 579-042 Fuel Tank Sending Unit Lock Ring - view 5

Dorman 579-042 Fuel Tank Sending Unit Lock Ring - view 6

DormanPart #: 579-042

Dorman 579-042 Fuel Tank Sending Unit Lock Ring

⚙️ 4 vehicles fit this part

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Select your vehicle to confirm fitment

Verify this part fits before purchasing — free returns if it doesn't

$50.25Free Shipping

🚚Free ShippingNo Cost to Continental U.S.

🔄Free Returns*Wrong fit? No cost

🛡️60-Day ReturnsMoney back guarantee

*Free return shipping only qualifies if our fitment verification tool is used.

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✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.

✅OE Direct Replacement — Bolt-on fit, no modifications needed

🚗Fitment: Ford, Thunderbird

🔄Easy Returns — Return within 60 days for a full refund

🚚Fast Shipping — Most orders ship same business day before 1pm CST

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Dorman 579-042 Fuel Tank Sending Unit Lock Ring

Brand	Dorman
Part Number	579-042
Material	Steel rubber
Inside Diameter	1.9
Outside Diameter	2.67
Mounting Hardware Included	No
Gasket Or Seal Included	Yes
Lock Ring Diameter (In)	2.67 in
Package Contents	1 fuel pump lock ring

This part fits 4 vehicles. Search below:

Year	Make	Model	Position	Notes
1960	Ford	Thunderbird	N/A
1959	Ford	Thunderbird	N/A
1958	Ford	Thunderbird	N/A
1957	Ford	Thunderbird	N/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

LO42

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.