N6.3-53-21 Midship Tube Shaft 46 Splines fits Neapco 4.062 in Outside Diameter x 0.165 in Wall Thickness Tube
N6.3-53-21 Midship Tube Shaft 46 Splines fits Neapco 4.062 in Outside Diameter x 0.165 in Wall Thickness Tube
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N6.3-53-21 Midship Tube Shaft 46 Splines fits Neapco 4.062 in Outside Diameter x 0.165 in Wall Thickness Tube

Aftermarket
6.3-53-21
In stock
$85.05
The N6.3-53-21 Midship Tube Shaft is engineered for heavy-duty driveline systems, offering a precise fit and...
$85.05

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N6.3-53-21 Midship Tube Shaft 46 Splines fits Neapco 4.062 in Outside Diameter x 0.165 in Wall Thickness Tube

The N6.3-53-21 Midship Tube Shaft is engineered for heavy-duty driveline systems, offering a precise fit and long-lasting performance. Built with 46 splines and designed to fit 4.062-inch OD x .165-inch wall tubing, this shaft ensures a secure connection and smooth power transfer in demanding applications. Its high-strength steel construction guarantees durability under intense torque and load conditions, making it a trusted choice for professionals.

This shaft is designed to reduce vibration, increase drivetrain efficiency, and provide reliability that meets or exceeds OEM standards. Perfect for both replacement and custom driveline builds, it delivers peace of mind whether you’re restoring, upgrading, or fabricating.

For trucks, SUVs, industrial machinery, or agricultural equipment, the N6.3-53-21 Midship Tube Shaft ensures dependable performance and strength in the toughest environments.

Upgrade your driveline with the N6.3-53-21 Midship Tube Shaft – built for heavy-duty strength, precision, and unmatched durability in the most demanding applications.

Features and Benefits

  • Heavy-Duty Steel Construction – Provides superior strength and longevity under high torque.

  • 46-Spline Design – Ensures precise fitment and secure power transfer.

  • Precision-Machined – Reduces vibration and promotes smooth operation.

  • OEM-Grade Quality – Meets or exceeds manufacturer standards.

  • Versatile Applications – Suitable for trucks, SUVs, industrial, and agricultural equipment.

Technical Specifications

Specification Value
Part Number N6.3-53-21
Interchange Numbers 6.3-53-21, N6.3-53-21, 250-635321, 635321, 23913212285
Material Steel
Warranty 1 Year
Spline Count 46
Spline Diameter 2.35 in (59.69 mm)
Tube Diameter & Wall Thickness 4.062 in x .165 in (103.175 mm x 4.191 mm)
Butt Diameter 3.75 in (95.25 mm)
Length of Shoulder 0.812 in (20.6 mm)
End of Spline to Weld 5.312 in (135 mm)
Length of Spline 2.719 in (69 mm)

 

Vehicle Compatibility

Application Type Details
Heavy-Duty Trucks Designed for high-load driveline applications
SUVs & Automotive Compatible with select Neapco and Spicer systems
Industrial Machinery Built for heavy machinery and equipment requiring strength
Agricultural Use Suitable for farm equipment driveline assemblies
Tubing Fitment Fits 4.062" OD x .165" wall driveshaft tubes

 

What's Included

  • 1x N6.3-53-21 Midship Tube Shaft (46 Splines)

  • Manufacturer packaging

REVIEWS

DL

Solid part, exactly as described. Fit my heavy-duty truck perfectly and runs smooth with no vibration.

David L.

Cleveland, OH

★★★★★
KR

Great quality shaft. Installed on my off-road rig and it’s been holding up under some tough conditions.

Kevin R.

Boise, ID

★★★★★
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Effective Date: October 2024
We offer a 30-day return policy, allowing you to request a return within 30 days of receiving your item. To qualify for a return, the item must be in its original condition—unused, with tags, and in its original packaging. A receipt or proof of purchase is also required.

To initiate a return, please contact us at info@riotparts.com. Returns must be shipped to the address provided upon request. If your return is approved, we will issue a return shipping label along with detailed instructions.

Important
Returns sent without prior authorization will not be accepted.

For any return-related inquiries, please reach out to us at info@riotparts.com.

Return Shipping Address
The return shipping address will be determined based on the requestor’s location to ensure the nearest return facility is used.

Possible return locations include:
10880 Lear Blvd.
Reno, NV 89506, United States
931 W. Bardin Rd., Suite 150–200
Arlington, TX 76017, United States
3035 Campus Dr.
Hatfield, PA 19440, United States
5789 N. Graham Road, Ste 200
Whiteland, IN 46184, United States
2020 NE Aloclek Dr 4711 N Lamon Ave
#118 STE 12, Hillsboro, OR 97124, United States

Damages and Issues
We recommend inspecting your order upon receipt. If you find that an item is defective, damaged, or if you received the wrong item, please contact us immediately so we can address the issue.

Exceptions / Non-Returnable Items
Certain items cannot be returned, including:
• Electrical parts that have been installed or used
• Special order parts that were custom ordered for you
• Items that have been damaged due to improper installation or use

If you have questions or concerns about a specific item, please contact us for assistance.

Exchanges
For exchanges, the quickest option is to return the item you have. Once the return is accepted, you can make a separate purchase for the new item.

Refunds
We will notify you once we receive and inspect your return to inform you whether your refund is approved. If approved, you will be automatically refunded using your original payment method within 10 business days. Please be aware that it may take additional time for your bank or credit card company to process and post the refund.

If more than 15 business days have passed since your return was approved and you haven’t received your refund, please contact us at info@riotparts.com.

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