OE Quality 60-Day Returns

Pioneer Cables 839012 Woodruff Key

Brand	Pioneer Cables 839012
Fits	Ford, Lincoln, and Mercury · 88 vehicles

Woodruff key. A precision-fit fastening component for secure shaft and hub alignment.

$13.17Free shipping

In stock · usually ships same day before 1pm CST

Step 1 — Confirm fitment

Free return shipping if it doesn't fit when you check fitment here first.

Select your vehicle to confirm fitment

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

Step 2 — Quantity

Free shipping to the continental U.S.

Free returns within 60 days if it doesn't fit when fitment is verified.

Not what you need? See all Woodruff Key options

Pioneer Cables 839012 Woodruff Key for Ford and Mercury

Pioneer Cables 839012 is a Woodruff key for classic Ford, Lincoln, and Mercury applications that use a wide 3/16" x 1 13/32" hi-perf. key profile. It is listed for a broad range of vintage V8-era vehicles, including Ford Mustang, Ford Thunderbird, and Mercury Cougar applications.

Key Features

Woodruff key for engine and drivetrain service applications
Wide hi-performance profile: 3/16" x 1 13/32"
Direct fitment listed for multiple Ford, Lincoln, and Mercury models
Part number 839012 for catalog and service matching
Fits classic applications such as Ford LTD, Mercury Marquis, and Lincoln Continental

Detailed Description

Pioneer Cables 839012 is a replacement Woodruff key used in service work where a precise keyed connection is required. The fitment data covers 1961-1978 vehicles across Ford, Lincoln, and Mercury, including Fits 1967-1969 Ford Mustang, N/A; Fits 1961-1968 Ford Thunderbird, N/A; and Fits 1968-1978 Lincoln Continental, N/A. This part number 839012 also appears in listings for Mercury Cougar, Mercury Montego, Mercury Colony Park, Mercury Marauder, Mercury Villager, Mercury Marquis, Mercury Grand Marquis, Ford LTD, and Ford Thunderbird applications.

What It Is Used For

Replacing a worn or damaged Woodruff key during engine service
Restoring proper alignment between keyed components
Addressing fitment issues caused by incorrect key size
Supporting maintenance on classic Ford, Lincoln, and Mercury drivetrains

Installation Notes and Tips

Verify the required key dimensions before installation: 3/16" x 1 13/32" wide hi-perf. specification. Match the application to the exact year, make, and model listed for your vehicle, since fitment varies across Ford Mustang, Ford Thunderbird, Mercury Cougar, and related platforms. Confirm the keyed slot is clean and free of burrs before seating the part.

Quality Assurance

Pioneer Cables 839012 is cataloged as a service-grade hardware component for the listed classic vehicle applications. This part cross-references no additional part numbers in the provided data.

This part fits 88 vehicles

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

Year	Make	Model	Liters	Cylinders	Position	Notes
1978	Ford	LTD	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1978	Lincoln	Continental	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1978	Mercury	Grand Marquis	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1978	Mercury	Marquis	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1977	Ford	LTD	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1977	Lincoln	Continental	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1977	Mercury	Grand Marquis	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1977	Mercury	Marquis	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1976	Ford	LTD	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1976	Ford	Thunderbird	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1976	Lincoln	Continental	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1976	Mercury	Cougar	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1976	Mercury	Grand Marquis	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1976	Mercury	Marquis	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1976	Mercury	Montego	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1975	Ford	LTD	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1975	Ford	Thunderbird	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1975	Lincoln	Continental	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1975	Mercury	Cougar	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1975	Mercury	Grand Marquis	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1975	Mercury	Marquis	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1975	Mercury	Montego	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1974	Ford	LTD	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1974	Ford	Thunderbird	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1974	Lincoln	Continental	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1974	Mercury	Colony Park	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1974	Mercury	Cougar	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1974	Mercury	Marquis	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1974	Mercury	Montego	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1973	Ford	LTD	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1973	Ford	Thunderbird	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1973	Lincoln	Continental	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1973	Mercury	Colony Park	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1973	Mercury	Cougar	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1973	Mercury	Marquis	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1973	Mercury	Montego	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1972	Ford	LTD	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1972	Ford	Thunderbird	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1972	Lincoln	Continental	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1972	Mercury	Colony Park	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1972	Mercury	Marquis	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1971	Ford	LTD	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1971	Lincoln	Continental	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1970	Ford	LTD	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1970	Lincoln	Continental	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1970	Mercury	Colony Park	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1970	Mercury	Marauder	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1970	Mercury	Marquis	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1969	Ford	LTD	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1969	Ford	Mustang	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1969	Lincoln	Continental	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1969	Mercury	Colony Park	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1969	Mercury	Cougar	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1969	Mercury	Marauder	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1969	Mercury	Marquis	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1969	Mercury	Montego	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1968	Ford	LTD	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1968	Ford	Mustang	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1968	Ford	Thunderbird	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1968	Lincoln	Continental	7.5L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1968	Mercury	Colony Park	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1968	Mercury	Cougar	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1968	Mercury	Marquis	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1968	Mercury	Montego	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1967	Ford	LTD	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1967	Ford	Mustang	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1967	Ford	Thunderbird	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1967	Mercury	Colony Park	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1967	Mercury	Cougar	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1967	Mercury	Villager	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1966	Ford	LTD	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1966	Ford	Thunderbird	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1966	Mercury	Colony Park	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1966	Mercury	Marauder	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1966	Mercury	Villager	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1965	Ford	LTD	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1965	Ford	Thunderbird	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1965	Mercury	Colony Park	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1965	Mercury	Marauder	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1964	Ford	Thunderbird	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1964	Mercury	Colony Park	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1964	Mercury	Marauder	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1963	Ford	Thunderbird	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1963	Mercury	Colony Park	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1963	Mercury	Marauder	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1962	Ford	Thunderbird	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1962	Mercury	Colony Park	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
1961	Ford	Thunderbird	6.4L	V8	N/A	Kit - Hi-Perf. - Wide - 3/16" x 1 13/32"
No rows match your filter.