1 3/8 6 Spline Female to 1 3/8 21 Spline Male PTO Adapter – Part # B153
1 3/8 6 Spline Female to 1 3/8 21 Spline Male PTO Adapter – Part # B153
1 3/8 6 Spline Female to 1 3/8 21 Spline Male PTO Adapter – Part # B153
1 3/8 6 Spline Female to 1 3/8 21 Spline Male PTO Adapter – Part # B153
1 3/8 6 Spline Female to 1 3/8 21 Spline Male PTO Adapter – Part # B153
PTO Adapter 1 3/8" 6 Splines Female 1 3/8" 21 Splines Male PTO Adapter 1 3/8" 6 Splines Female 1 3/8" 21 Splines Male $49.99
B3725 PTO Adapter with 1 3/4 6 Splines F and 1 3/8 6 Splines M $106.99
Pto Adapter

1 3/8 6 Spline Female to 1 3/8 21 Spline Male PTO Adapter

Part No. B153 · Overall length 6.5"

Bare-co PTO Adapter

Clamp Type

$59.99

Overall Length
6.5"
Female
1 3/8" 6 Spline
Male
1 3/8" 21 Spline

Units Sold: 8

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⚠ WARNING: Rotating drivelines can cause serious injury or death. Keep all guards and shields in place, shut off the engine and remove the key before working on the driveline, and use a part rated for your tractor and implement.
⚠ WARNING (California): This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Specifications

1 3/8 6 Spline Female to 1 3/8 21 Spline Male PTO Adapter specifications
Part numberB153
Overall Length6.5"
Female1 3/8" 6 Spline
Male1 3/8" 21 Spline
Shipping weight5 lbs
Box size9 × 6 × 6 in

About this part

Upgrade your tractor’s compatibility with this 1 3/8 6 spline female to 1 3/8 21 spline male PTO adapter, designed to seamlessly connect standard 6-spline PTO shafts to equipment requiring a fine 21-spline connection. This high-quality PTO adapter allows you to use modern implements with older tractors, ensuring efficient power transfer and reducing the need for costly modifications.

Constructed from heavy-duty, heat-treated steel, this 1 3/8 6 spline female to 1 3/8 21 spline male PTO adapter is built for durability and high torque applications. The precision-machined splines provide a tight, slip-resistant fit, minimizing wear and preventing power loss due to misalignment. Whether you’re running rotary cutters, balers, post-hole diggers, or other PTO-driven equipment, this adapter ensures a secure and reliable connection.

This PTO adapter is ideal for farmers, ranchers, and agricultural professionals needing a quick and effective PTO conversion solution. Designed for heavy-duty agricultural use, it features a corrosion-resistant coating to protect against rust and environmental wear, ensuring long-lasting performance even in harsh working conditions.

Enhance your tractor’s versatility with this rugged and dependable 1 3/8 6 spline female to 1 3/8 21 spline male PTO adapter. It’s the perfect PTO conversion tool for improving compatibility between tractors and implements, keeping your operation running efficiently with minimal downtime.

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