Heavy-duty hydraulic connections that thread together and can be connected or disconnected under pressure. The Breco B-6120-12 is a brass 3/4″ coupler from the 6100 Wing Nut Series — a double shut-off coupling that uses a threaded wing nut for a secure, high-pressure connection. Rated to 3000 PSI with 28 GPM flow.
Specifications
- Brand: Breco
- Series: 6100 (Wing Nut Hydraulic)
- Part Number: B-6120-12
- Description: Socket
- Body: 3/4″ Socket
- Thread: 3/4″-14 Female NPT, NPTF
- Type: Heavy-duty double shut-off, threaded wing-nut connection
- Key Feature: Connect / disconnect UNDER pressure, minimal air inclusion and fluid loss
- Construction: Brass body, zinc-plated steel wing nut, stainless steel springs
- Seal: Buna-N
- Max Working Pressure: 3000 PSI
- Rated Flow: 28 GPM
- Temperature Range: -40F to +250F
- Quantity: 1pc
- Origin: Made in USA
Why this coupler
- Connect / disconnect under pressure — which means you can couple even with trapped line pressure, with minimal air inclusion and fluid loss.
- Threaded wing-nut connection — which means a secure, high-pressure hold that resists vibration and accidental disconnect.
- Double shut-off — which means both halves seal at disconnect to prevent fluid loss and contamination.
- Brass body with stainless springs — which means corrosion resistance and reliable spring performance.
Frequently asked questions
What is a wing nut coupler?
A heavy-duty hydraulic coupling that threads together with a wing nut, allowing connection and disconnection even under pressure — common on high-pressure hydraulic lines.
What pressure is it rated for?
Rated to 3000 PSI (3/4″), per the 6100 Series ratings.
Can it connect under pressure?
Yes — that is the key feature: connect and disconnect under pressure with minimal air inclusion and fluid loss.
Ideal for high-pressure hydraulic lines that must connect under pressure. Pair this coupler with a matching 3/4″ 6100 Series plug and wing nut.
Why buy from hpcouplers: Breco quality, responsive US-based support, accurate specs, fast shipping.
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