Reducing Brass Hex Nipple - 3/8in x 1/4in Male NPT - DOT Air Brake Fitting - Eaton 3325X6X4 Parker 216P64 177.9122CB

Step a brake line down a size without a stack of adapters using this DOT brass reducing hex nipple distributed by FleetPro Parts & Tires. One end is 3/8in NPT male, the other is 1/4in NPT male, so a 3/8in port feeds a 1/4in component in a single fitting. This is the join every shop improvises with a bushing and a nipple stacked together, and that improvisation adds a second sealing surface, extra length hanging off the port and one more thing to vibrate loose behind a frame rail. Supplied under the Automann brand at Fleet Standard grade, 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.

Two Sizes, One Fitting: The DOT Reducing Nipple Advantage

This fitting meets FMVSS 571.106 / DOT requirements for brake circuits, so it is intended for air brake plumbing on tractors and trailers. Both ends are tapered NPT, which means each joint tightens progressively as it is driven and seals on the thread flanks - and because it is one piece, there is only one fitting to torque and one part number to reorder.

The brass body handles the condensate, compressor oil carryover and road salt moving through a heavy-duty air system, and it will not gall into the valve body or manifold at either end when that component eventually has to come off. It weighs 0.1 lbs and the hex centre gives a wrench a proper grip, so the nipple gets torqued on its own instead of being spun by the part it feeds. It also carries the older Automann 177.9512 reference.

At FleetPro Parts & Tires, we know the reducer is the fitting nobody stocks until the truck is on the lift. This Automann nipple is a direct replacement for highly searched industry numbers including Eaton 3325X6X4 and Parker 216P64.

Vehicle Fitment & Compatibility

This universal-application DOT brass fitting is intended for the following commercial use:

• Make/Model: Universal - tractors and trailers
• System: Air brake plumbing on tractors and trailers
• Threads: 3/8in NPT male x 1/4in NPT male
• Compliance: Meets FMVSS 571.106 / DOT requirements for brake circuits
• Component Group: Air Brake & Wheel / Air System Manifolds & Valves

Direct Replacement & Cross-Reference Numbers:

This Automann brass nipple serves as a direct replacement for the following part numbers:

• Eaton Interchange: 3325X6X4
• Parker Interchange: 216P64
• Supersedes Automann: 177.9512
• Automann Distributor #: 177.9122CB

Technical Specifications

• Component Type: Brass Reducing Hex Nipple
• Threads: 3/8in NPT Male x 1/4in NPT Male
• Body Material: Brass
• Application: Air brake plumbing on tractors and trailers
• Compliance: Meets FMVSS 571.106 / DOT requirements for brake circuits
• Replaces Automann #: 177.9512
• Weight: 0.1 lbs
• Package Dims: 1.2 x 0.7 x 0.7 in
• UPC: 889626447266
• Product Level: Fleet Standard Aftermarket
• Brand: Automann (Distributed by FleetPro Parts & Tires)