Coupler Cork – Industrial (ISO 6150 B / B-Style)
Secure Checkout
Shop by Categories
Secure Checkout
Your onboard air system lives where dirt, mud, dust, sand and water are part of the territory. An exposed quick-connect coupler gives all of it somewhere to go.
The CMM Offroad Coupler Plug provides a simple, purpose-built way to protect an unused female air coupler until you're ready to connect your hose.
Precision CNC-machined in the USA, the Coupler Plug snaps directly into a compatible female quick-connect fitting just like the mating air fitting would. Once installed, it helps prevent contaminants from reaching the internal components of the coupler.
This Coupler Cork fits 1/4" Industrial, ISO 6150 Series B, Fed Spec A-A-59439 couplers, also known as B-Style.
Running an automotive coupler instead? Automotive 1/4" Tru-Flate (T-Style) couplers use a different plug profile and are not interchangeable with B-Style. Look for our Coupler Cork – Automotive (Tru-Flate / T-Style).
6061-T6 Aluminum
Our standard Coupler Plug provides an excellent combination of durability, corrosion resistance and lightweight performance.
7075-T6 Aluminum
For customers who want the premium option, our 7075 version provides substantially higher material strength while maintaining the same compact design.
Every CMM Coupler Plug receives a Cerakote finish for additional surface protection and the finished appearance you'd expect from CMM Offroad.
Available in:
Black Cerakote
USMC Red Cerakote
Designed for compatible 1/4" quick-connect female air couplers commonly found on onboard-air systems using 3/8" air hose.
Ideal for couplers mounted on:
Bumpers
Underhood air systems
Compressor installations
Air tanks
Air manifolds
Exterior air connection points
Shop and service equipment
Each Coupler Plug includes a stainless steel split-ring retainer, providing a durable attachment point for tethering the plug near the coupler so it's there when you need it.
CNC machined aluminum construction
Choice of 6061-T6 or 7075-T6 aluminum
Cerakote® protective finish
Black and USMC Red color options
Stainless steel split-ring retainer included
Fits 1/4" Industrial ISO 6150 Series B (B-Style) couplers
Helps block dirt, mud, sand, dust and moisture
Quick push-in installation and removal
Reusable
Compact, lightweight design
Designed and machined in the USA
You've invested in your compressor, air lines, fittings and onboard-air system. Don't leave the connection point exposed.
Plug it. Protect it. Hit the trail.
Please read the policy below to familiarize yourself with how we operate.
Please verify the part number that you are ordering before you place your order. If a part is ordered incorrectly by the customer and then returned, the customer will be responsible for all shipping charges and will be subject to a 20% restocking fee. We cannot be held responsible for manufacturer misinformation. If we messed up the order, then of course, we will take care of it. An RGA number must be requested within 7 days of receipt of the product by the customer. Returns must be received within 30 days of the initial purchase. We do not accept returns after 30 days. If an RGA is requested after 7 days of receiving the product then only an in-store credit will be issued. We do not refund shipping costs.
At Offroad Trading Company, we are committed to providing high-quality products and ensuring customer satisfaction. It does not matter if it is a Jeep, Truck, Bronco or any other 4x4 vehicle, our extensive experience and deep understanding of the off-road industry enable us to offer products that meet the highest standards of quality and performance. Choosing Offroad Trading Company means choosing a partner who is as passionate about off-roading as you are.