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Mile Marker 423 External Locking Hub Supreme Manual 19 Spline 6 Bolt Count Set Of 2
Mile Marker 423 External Locking Hub Supreme Manual 19 Spline 6 Bolt Count Set Of 2
423 (1200 x 1200.png
MM-logo-3 colors NO ROAD-01.png

Mile Marker 423 External Locking Hub Supreme Manual 19 Spline 6 Bolt Count Set Of 2

Vendor: Mile Marker
SKU: BCBT_423
Availability: 25 In Stock
$224.00 USD
$235.00
$224.00 USD
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Description
Description
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Mile Marker · Manual Locking Hub Pair

Mile Marker 423 External-Mount Manual Locking Hubs

Mile Marker 423 is a pair of chrome manual locking hubs for matching external-mount Dana 44/Dana 44HD front axles with 19 splines, six mounting bolts on a 3.75-inch circle and a 1.25-inch axle outside diameter.

Product Description

The all-metal manual hubs replace compatible original manual or automatic hub assemblies and provide positive LOCK/FREE selection at the wheel. Because many supported vehicles are decades old and may have replacement axles, the measured hub interface controls fitment more reliably than year/make/model alone.

All four interface specifications must match: external mounting, 19 splines, six bolts, 3.75-inch bolt circle and 1.25-inch axle diameter. A qualified installer should inspect wheel bearings, spindle hardware and axle condition, follow the axle service procedure and use the specified torque values.

Features & Benefits

  • Heavy-duty manual engagement: all-metal dial and cap provide direct LOCK/FREE control.
  • External-mount interface: designed for the matching six-bolt hub pattern.
  • 19-spline drive: fits the specified Dana 44/44HD axle-shaft interface.
  • Chrome finish: corrosion-resistant metal exterior with polished dial.
  • Pair package: replaces both front hubs together.
  • Serviceable installation: includes gaskets, snap rings, fasteners and instructions for the compatible assembly.

Compatibility & Applications

  • Interface: external-mount Dana 44/44HD, 19 splines, 6 bolts, 3.75 in bolt circle, 1.25 in axle outside diameter.
  • AMC/Jeep: J20 pickup, 1974–1977, 6-bolt 19-spline application.
  • Chevrolet/GMC: K20 3/4-ton pickup, 1960–1977, matching axle application.
  • Dodge: W100 1/2-ton pickup 1957–1968; W200 3/4-ton applications excluding full-time 4WD, subject to exact axle.
  • Ford: 3/4-ton models with matching 3500 axle, 1963–1977, excluding full-time 4WD.
  • International Harvester: listed 3/4-ton pickup and Travelall applications from 1956–1975 with matching hub interface.
  • Final fitment rule: verify the actual axle and dimensions; axle swaps or prior conversions override the vehicle catalog.

Frequently Asked Questions

Q: What axle interface does Mile Marker 423 require?

A: An external-mount Dana 44/44HD interface with 19 splines, six bolts on a 3.75-inch circle and a 1.25-inch axle outside diameter.

Q: Why must the axle be measured?

A: Older trucks are often converted or axle-swapped. The hub dimensions and mount type determine fitment even when the vehicle appears in a catalog.

Q: How many hubs are included?

A: Two complete manual hub assemblies for the front axle.

Q: Does it fit full-time four-wheel-drive systems?

A: The listed Dodge/Ford applications exclude full-time 4WD. Do not install without confirming a compatible selectable-hub axle system.

Q: Can it replace an automatic locking hub?

A: Mile Marker lists it as a replacement for compatible original manual or automatic hubs, but the axle interface must match exactly.

Q: Are wheel bearings and spindle parts included?

A: No. Those are axle service items and should be inspected or replaced separately as needed.

Q: How are the hubs operated?

A: With the vehicle safely stopped, turn both front dials to the marked LOCK or FREE position as directed by the vehicle and hub instructions.

Q: What warranty applies?

A: Mile Marker lists limited lifetime coverage for qualifying defects under its current warranty terms and correct installation.

More product details & helpful resources

Benefits & Ideal Uses

  • Appropriate for restoration or service of matching legacy 3/4-ton and Jeep front axles.
  • The exact hub specification guide provides a reliable fitment check when vehicle history is uncertain.
  • Replacing both hubs together provides consistent engagement and matching external hardware.

Related Resources

Ordering Guidance

Order MPN 423 only after measuring the actual axle: external mount, 19 splines, six bolts, 3.75-inch bolt circle and 1.25-inch axle diameter must all match.

Vehicle Fitment
Vehicle Fitment
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Shipping
Shipping
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SHIPPING & DELIVERY INFORMATION

Free Shipping

  • Eligibility: Orders over $99 in the USA & Canada.
  • Exceptions: Oversized or heavy items may incur extra fees (we’ll notify you before shipping).
  • Non-Eligible Areas: Vancouver Island, Yukon, NWT, Nunavut, Alaska, Hawaii, Puerto Rico & other U.S. territories.

Fast Shipping

  • Processing: Orders placed before 2 PM usually ship the same day.
  • Delivery Time: 2–5 business days via Purolator, FedEx, or Loomis Express.
  • Note: Delivery may take longer for distant warehouses or inter-warehouse transfers.

Shipping Limitations

  • No P.O. Boxes: Please provide a physical address.
  • Remote Areas: Free shipping excludes remote regions.

Special Orders & Backorders

  • May incur additional handling fees (discussed before shipping).
  • You may cancel if costs are too high for a full refund.

Warranty

  • For internal damage or missing parts, contact the manufacturer directly for faster service.
  • After 30 days, contact the manufacturer first — if unresolved, our team will assist.

Oversized Items

  • Shipped via LTL Freight (items over 150 lbs or large dimensions).
  • We’ll confirm any added costs before shipping.
  • Examples: Large Fridges, Oversize Toolbox or Tanks, Drop in Bed liners, Wheel to Wheel Step bar & Running Boards, Large Roof Cargo Box, Heavy Bumpers, RV Doors, Oversize, Roof Tent, Large gas tank, Oversize Grille Guards, Fifth Wheel Hitch, Sofa , Trailer Axle.
  • Special Handling Fees: Items like batteries may incur additional shipping fees.

Returns & Cancellations

In-Stock Items

  • Cancel before shipment; once shipped, standard return policy applies.
  • 20% restocking fee, excluding oversize item. Both way shipping is customer responsibility under store error.

Backorders / Special Orders

  • 5% restocking fee applies if canceled within 30 days.
  • Non-cancellable once shipped from the manufacturer.
  • Refused Deliveries: Refund minus shipping & restocking fees (excludes special orders).
  • Payment Disputes: Chargebacks do not cancel orders — please contact us directly.

Core Fees

  • Not included in the purchase price.
  • Refundable upon return of the old part in usable condition.

If you have any questions or need assistance, please reach out to us at 800.292.4173 or support@mytruckpoint.ca.

Why Us
Why Us
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