Brass Push-Lock Male Connector - 3/8" Tube x 1/2" Pipe DOT Air Brake Fitting - Eaton 1868X6X8 Tectran PL13686D 177.13B686D
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Fitment
Fits these trucks
Universal - Class 8 tractors, commercial trailers and heavy-duty equipmentAir brake plumbing on tractors and trailers3/8 in air-brake tubing to a 1/2 in pipe endDOT brake circuits - meets FMVSS 571.106
Always confirm your year, make & model before ordering.
Part numbers
OEM & interchange numbers
4 cross-refsEaton 1868X6X8 Tectran PL13686D Velvac 016168 68PMT68
Direct 1-to-1 replacement for every number above. Tap any number to copy.
Overview
Half-inch ports show up where the air system moves the most volume - wet tanks, reservoirs and compressor discharge plumbing - and the line feeding them is usually 3/8 in tube. This Brass Push-Lock Male Connector from Automann makes that connection in one piece: a 3/8 in tube end to a 1/2 in pipe end, male to male. Stacking a bushing on an adapter to get there just adds two more joints that can weep and two more places to chase a leak in the dark. 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, Not Three: The 3/8 in x 1/2 in Male Connector Advantage
This is a male-to-male brass push-lock connector, so the tube side needs no ferrule and the port side needs no adapter. Fewer joints in a brake circuit means fewer leak paths, less weight hanging off the port, and a shorter assembly that clears the brackets and crossmembers around a tank. Brass is the right material down there: it does not rust the way plated steel does when salt water and condensate collect around the boss, and it still backs out cleanly the next time the tank has to come off.
On the tube side, the collet grips 3/8 in air-brake tubing by hand - cut it square, push it home, pull to confirm. The connector is DOT-approved for heavy-duty air brake systems and meets FMVSS 571.106, which is what makes it legal on a brake circuit rather than accessory air only. Automann builds it to Fleet Standard specifications for universal application.
This fitting is a direct replacement for highly searched industry numbers including Eaton 1868X6X8, Tectran PL13686D, Velvac 016168 and 68PMT68. Drain the tank fully and check the boss threads for corrosion before you install the new fitting.
Vehicle Fitment & Compatibility
This DOT brass air fitting uses a universal design intended for the following commercial applications:
- Make/Model: Universal - Class 8 tractors, commercial trailers and heavy-duty equipment
- System: Air brake plumbing on tractors and trailers
- Tube Size: 3/8 in air-brake tubing
- Port Size: 1/2 in pipe end, male to male
- Compliance: DOT-approved for heavy-duty air brake systems, meets FMVSS 571.106
- Component Group: Air Brake & Wheel / Air System Manifolds & Valves
Direct Replacement & Cross-Reference Numbers:
This Automann brass fitting serves as a direct replacement for the following part numbers:
- Eaton Interchange: 1868X6X8
- Tectran Interchange: PL13686D
- Velvac Interchange: 016168
- Additional Interchange: 68PMT68
- Automann Distributor #: 177.13B686D
Technical Specifications
- Component Type: Push-lock male connector, brass
- Configuration: Male to male
- Tube End: 3/8 in
- Pipe End: 1/2 in
- Application: Universal
- Compliance: DOT-approved, FMVSS 571.106
- Grade: Fleet Standard
- UPC: 889626032233
- Product Level: Fleet Standard Aftermarket
- Brand: Automann (Distributed by FleetPro Parts & Tires)
Key features
- One-Piece 3/8 in to 1/2 in Step: Goes straight from 3/8 in tube to a 1/2 in pipe end without stacking a bushing on an adapter - two fewer joints to weep.
- Male-to-Male Brass Body: No ferrule on the tube side and no adapter on the port side, so the assembly stays short and clears tank brackets and crossmembers.
- Push-Lock Tube End: Square-cut 3/8 in air-brake tubing pushes in by hand and locks in the collet - no special tool needed at the roadside.
- Brass Survives the Tank Boss: Where salt water and condensate collect, brass does not rust in place, so the fitting still backs out cleanly next time.
- DOT Air Brake Legal: Approved for heavy-duty air brake systems and meets FMVSS 571.106, so it can be used on brake circuits, not just accessory air.
Specifications
Component Type
Push-lock male connector, brass
Configuration
Male to male
Tube End
3/8 in
Pipe End
1/2 in
Application
Universal
Compliance
DOT-approved, FMVSS 571.106
Grade
Fleet Standard
UPC
889626032233
Product Level
Fleet Standard Aftermarket
Questions
Will this fit my truck?
This part fits Universal - Class 8 tractors, commercial trailers and heavy-duty equipment, Air brake plumbing on tractors and trailers, 3/8 in air-brake tubing to a 1/2 in pipe end, DOT brake circuits - meets FMVSS 571.106. 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 1868X6X8, Tectran PL13686D, Velvac 016168, 68PMT68.
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.