Brass Reducer Coupling - 1/2" NPT x 3/8" NPT Female Air Line Fitting - Replaces Eaton 3300X8X6 Parker 208P86 177.9119DC
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$3.77
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Fitment
Fits these trucks
Universal - Class 8 tractors, trucks and commercial trailersNPT air-brake and air-line connectionsAir-accessory plumbing on tractors and trailers
Always confirm your year, make & model before ordering.
Part numbers
OEM & interchange numbers
6 cross-refsEaton 3300X8X6 Parker 208P86 119DC 017085 S11986 177.9050
Direct 1-to-1 replacement for every number above. Tap any number to copy.
Overview
Step an air line down a size without a stack of adapters using this brass reducer coupling distributed by FleetPro Parts & Tires. It is shop-grade NPT pipe connection hardware for truck and trailer air-brake and air-accessory plumbing, with one 1/2 in female pipe end and one 3/8 in female pipe end in a single body. A weeping, cross-threaded or corroded fitting bleeds a reservoir down overnight, drags governor cut-in pressure down, sets off the low-air warning and can leave a tractor sitting on its spring brakes in the morning. Manufactured by Automann to Fleet Standard specifications, we stock these heavily right here in our Hanover Park, Illinois warehouse to ensure lightning-fast shipping for fleets, diesel repair shops, and owner-operators nationwide.
One Fitting Instead of Three: The Brass Reducer Coupling Advantage
Mismatched port sizes are a fact of life on a working chassis - a 1/2 in supply line arriving at a 3/8 in accessory, or a replacement valve that simply did not come with the port the old one had. The usual field fix is a nipple into a bushing into another nipple, and every one of those extra joints is another tapered thread that can weep and another inch of leverage hanging off a valve body. This single reducer coupling does the whole step-down in one part, with both ends female so a nipple threads straight in from either side.
The brass body is the shop standard for air system plumbing. It handles the moisture, road salt and compressor oil that live inside a heavy-duty air system, and it will not gall or seize into a valve body the way a steel fitting can, so the next technician can still get it apart. At FleetPro Parts & Tires, we know an air system is only as good as its weakest joint. This Automann coupling is a direct replacement for highly searched industry numbers including Eaton 3300X8X6 and Parker 208P86, it replaces the earlier 177.9050, and it also crosses to reference numbers 119DC, 017085 and S11986.
Vehicle Fitment & Compatibility
This universal-application brass fitting is intended for the following commercial use:
- Make/Model: Universal - Class 8 tractors, trucks and commercial trailers
- System: Air brake and air accessory plumbing
- Large End: One 1/2 in female NPT pipe end
- Small End: One 3/8 in female NPT pipe end
- Component Group: Air Brake & Wheel / Air System Manifolds & Valves
Direct Replacement & Cross-Reference Numbers:
This Automann brass coupling serves as a direct replacement for the following part numbers:
- Eaton Interchange: 3300X8X6
- Parker Interchange: 208P86
- Additional Interchange: 119DC, 017085, S11986
- Supersedes: 177.9050
- Automann Distributor #: 177.9119DC
Technical Specifications
- Component Type: Brass Reducer Coupling
- Large End: One 1/2 in Female Pipe End
- Small End: One 3/8 in Female Pipe End
- Thread: NPT tapered pipe thread
- Body Material: Brass
- Application: Universal - air brake systems
- Condition: New
- Warranty: 1-Year FleetPro Warranty
- UPC: 889626447051
- Product Level: Fleet Standard Aftermarket
- Brand: Automann (Distributed by FleetPro Parts & Tires)
Key features
- 1/2 in to 3/8 in In One Part: Does the whole step-down in a single fitting instead of a nipple, a bushing and another nipple.
- Two Female Ends: A nipple threads straight in from either side, so the coupling adapts in whichever direction the run needs.
- Fewer Joints, Fewer Leaks: Every tapered thread you delete is one less place for the system to weep down overnight.
- Solid Brass Construction: Brass shrugs off the moisture, road salt and compressor oil inside a heavy-duty air system and will not gall into a valve body.
- Direct Eaton and Parker Interchange: Crosses to Eaton 3300X8X6 and Parker 208P86, plus reference numbers 119DC, 017085 and S11986.
Specifications
Component Type
Brass Reducer Coupling
Large End
One 1/2 in Female Pipe End
Small End
One 3/8 in Female Pipe End
Thread
NPT tapered pipe thread
Body Material
Brass
Application
Universal - air brake systems
Supersedes
177.9050
Condition
New
Warranty
1-Year FleetPro Warranty
UPC
889626447051
Product Level
Fleet Standard Aftermarket
Questions
Will this fit my truck?
This part fits Universal - Class 8 tractors, trucks and commercial trailers, NPT air-brake and air-line connections, Air-accessory plumbing on tractors and trailers. Always confirm your year, make and model before ordering.
What part numbers does it replace?
Yes. It is a direct replacement that interchanges with Eaton 3300X8X6, Parker 208P86, 119DC, 017085, S11986, 177.9050.
How fast does it ship?
In-stock orders placed before 12 PM Central on business days ship the same day from our Hanover Park, IL warehouse, and typically arrive in 2 to 5 business days anywhere in the USA.
What's your return policy?
Unused items in original packaging can be returned within 30 days, backed by our 30-day money-back guarantee. If we ship the wrong part, we cover the return label and send the correct one.