AD-6-6A Male to Female Adaptor 6 Inner Splines 1 3/8" 6 Outer Splines 1 3/4" PTO
AD-6-6A Male to Female Adaptor 6 Inner Splines 1 3/8" 6 Outer Splines 1 3/4" PTO
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AD-6-6A Male to Female Adaptor 6 Inner Splines 1 3/8" 6 Outer Splines 1 3/4" PTO

Aftermarket
AD-6-6A
In stock
$56.00
The AD-6-6A Male to Female PTO Adaptor is a must-have for farmers, ranchers, and heavy equipment...
$56.00

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AD-6-6A Male to Female Adaptor 6 Inner Splines 1 3/8" 6 Outer Splines 1 3/4" PTO

The AD-6-6A Male to Female PTO Adaptor is a must-have for farmers, ranchers, and heavy equipment operators who need to convert a 1-3/8" 6-spline input to a 1-3/4" 6-spline output.

Crafted from heavy-duty steel and built to exact tolerances, this adaptor ensures a secure connection, smooth operation, and long-lasting reliability in the most demanding agricultural and industrial applications.

Whether you’re powering up a tractor, operating PTO-driven equipment, or running farm machinery, the AD-6-6A adaptor offers the strength, durability, and corrosion resistance needed to keep your equipment running smoothly.

Upgrade Your PTO Setup with Confidence
With the AD-6-6A Male to Female PTO Adaptor, you can connect mismatched splines quickly and securely. Built tough for farm life, it keeps your equipment working harder, longer.

Features and Benefits

  • Spline Conversion – Converts 1-3/8" inner 6-spline to 1-3/4" outer 6-spline for versatile compatibility.

  • Heavy-Duty Steel Construction – Built to withstand high torque and demanding farm applications.

  • Precision-Machined Splines – Ensures smooth operation and reduces premature wear.

  • Rust & Corrosion Resistant – Coated finish adds protection against harsh outdoor conditions.

  • Quick & Secure Fit – Allows fast installation into existing PTO systems.

  • Extended Equipment Life – Minimizes wear and damage to driveline components.

Technical Specifications

Specification Details
Part Type PTO Adaptor
MPN AD-6-6A
Brand Aftermarket
Inner Splines 6
Inner Spline Diameter (D) 1.375 in (34.9 mm)
Outer Splines 6
Outer Spline Diameter (D1) 1.75 in (44.4 mm)
Length (L) 6.8 in (144 mm)
Compatible Equipment Type Agricultural, Tractor, PTO-driven Equipment
Condition New (sealed packaging)
Warranty 1 Year

 

Vehicle & Equipment Compatibility

  • Tractors (various makes and models with PTO systems)

  • PTO-Driven Equipment

  • Agricultural Machinery

  • Industrial Applications requiring spline conversion

What’s Included

  • 1 × AD-6-6A Male to Female PTO Adaptor

  • Original manufacturer packaging

  • 1-Year Warranty

REVIEWS

DW

Solid adaptor! Works perfectly on my tractor’s PTO when switching implements. Easy install and feels super durable.

Daniel W.

Fargo, ND

★★★★★
KR

Needed this adaptor for my baler setup. Fit like a glove, no wobble, and it’s been holding up under daily use.

Kevin R.

Des Moines, IA

★★★★★
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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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