What is the Bahco 8971 adaptor used for?

It allows you to use 1/2" sockets with a ratchet or torque wrench featuring a 3/4" square drive.

What connection sizes does this adaptor have?

It features a 3/4" female square drive input and a 1/2" male square drive output.

What is the overall length of this adaptor?

The Bahco 8971 adaptor has an overall length of 58 mm.

Which technical standards does this adaptor meet?

This adaptor complies with ISO 1174, DIN 3120/3123, and UNE 16503 standards.

BAHCO 8971 adapter 3/4" square drive to 1/2" socket spanner 58 mm

Name: BAHCO 8971 adapter 3/4" square drive to 1/2" socket spanner 58 mm
Brand: BAHCO
SKU: 03330274
Price: 21.2 EUR
Availability: PreOrder

Supplier number: BAHCO 8971 | EAN 7314150492879

Recommended Retail Price €40.41

21.20 tax incl.

€17.52 excl. VAT (incl. all environmental contributions)

On order: delivered from 17/11/2026

Ordered before 20:00 - delivered as of 17/11/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL
Lifetime warranty on Bahco? Or limited in time? Read more about it here.

✆ Talk to a specialist

Alternative to this product

FACOM K.230B reducer 3/4" to 1/2"

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€20.33 excl. VAT

On stock, immediately available.

EXPERT E113821 reducer 3/4" to 1/2"

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Delivery time average 10 days.

Expand your drive range with the Bahco 8971 adaptor

Practical benefits

Connect different socket sizes: You easily attach your 1/2" sockets to 3/4" square drive tools, eliminating the need for extra ratchets.
High performance alloy steel: The durable alloy steel construction gives you dependable strength and resilience under heavy mechanical load.
Secure and precise fit: Manufactured to strict industry standards, it ensures your sockets stay firmly locked in place during fastening.

In a nutshell

The right choise for

With the Bahco 8971 adaptor, you easily combine different drive sizes without purchasing duplicate socket sets. This adaptor connects your 3/4" square drive ratchets, breaker bars, or torque wrenches directly to your standard 1/2" sockets. Made from high-performance alloy steel with a highly polished finish, it delivers dependable strength for demanding mechanical repairs, vehicle servicing, and industrial maintenance. Measuring 58 mm in overall length and precision-engineered to meet iso 1174, din 3120/3123, and une 16503 standards, it provides a secure, wobble-free fit. You get the full leverage of your heavy-duty tools while working with total confidence and control on every job.

Product information FAQ

€21.20

tax incl.

Key features according to our expert

Connection size 1: 3/4"
Connection size 2: 1/2"
Connection type 1 (adapter): Internal square
Connection type 2 (adapter): External square

Product description

Highly polished finish
High-alloy quality steel
Suitable for 3/4" and 1/2" sockets
Standards: Conforms to: ISO 1174, DIN 3120/3123 and UNE 16503

All Features

Connection size 1: 3/4"
Connection size 2: 1/2"
Connection type 1 (adapter): Internal square
Connection type 2 (adapter): External square

Brand BAHCO
03330274
EAN 7314150492879
Supplier number BAHCO 8971
Warranty Lifetime warranty on Bahco? Or limited in time? Read more about it here.

Frequently asked questions about this product

Answered by specialists

What is the Bahco 8971 adaptor used for?: It allows you to use 1/2" sockets with a ratchet or torque wrench featuring a 3/4" square drive.
What connection sizes does this adaptor have?: It features a 3/4" female square drive input and a 1/2" male square drive output.
What is the overall length of this adaptor?: The Bahco 8971 adaptor has an overall length of 58 mm.
What material is this adaptor made from?: It is made from high-performance alloy steel with a highly polished finish.
Which technical standards does this adaptor meet?: This adaptor complies with ISO 1174, DIN 3120/3123, and UNE 16503 standards.