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Brass Adapter M14x1.5 Male O-Ring x 1/4in NPT Female - DOT Air Brake Fitting Parker 222P-4-MI14 177.9120BM14
Brass Adapter M14x1.5 Male O-Ring x 1/4in NPT Female - DOT Air Brake Fitting Parker 222P-4-MI14 177.9120BM14
Automann

Brass Adapter M14x1.5 Male O-Ring x 1/4in NPT Female - DOT Air Brake Fitting Parker 222P-4-MI14 177.9120BM14

In stock
SKU: 177.9120BM14
$6.16
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Fitment

Fits these trucks

Universal - Class 8 tractors and commercial trailersAir brake plumbing on tractors and trailersAdapts a metric M14x1.5 port to a 1/4in NPT accessory
Always confirm your year, make & model before ordering.
Part numbers

OEM & interchange numbers

2 cross-refs
Parker 222P-4-MI14 Parker 222P4MI14
Direct 1-to-1 replacement for every number above. Tap any number to copy.
Overview

Put an NPT accessory on a metric port with this DOT-approved brass thread adapter distributed by FleetPro Parts & Tires. It takes a male M14x1.5 thread with an O-ring on one end and gives you a 1/4 in female NPT on the other, which is exactly what you need when a metric valve body, sensor boss or air dryer port has to feed a standard NPT gauge, hose end or accessory line. Trying to force an NPT fitting into a metric port is how ports get ruined. 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.

Metric Port, NPT Accessory: The M14x1.5 Adapter Advantage

The important detail on this adapter is the O-ring on the male thread. A metric straight thread does not seal on the threads the way a tapered NPT thread does - it seals on the O-ring face at the bottom of the boss. That means you tighten it down to seat the seal and stop, with no sealant tape, no pipe dope and no guessing at how many turns past finger tight. It also means the joint can be taken apart and put back together without the slow, one-way tightening that eventually splits a cast metric boss.

Because this fitting is DOT-approved and meets FMVSS 571.106, it belongs in an actual brake circuit rather than being a shop-grade air hose fitting pressed into service - which matters at inspection time. The brass body handles the moisture, road salt and compressor oil that live inside a heavy-duty air system and will not gall or seize into a valve body the way a steel fitting can. At FleetPro Parts & Tires, we know a brake job is only as good as its weakest connection. This Automann adapter is a direct replacement for Parker 222P-4-MI14, also listed as 222P4MI14.

Vehicle Fitment & Compatibility

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

  • Make/Model: Universal - Class 8 tractors and commercial trailers
  • System: Air brake plumbing on tractors and trailers
  • Male End: M14x1.5 with O-ring, for a metric straight-thread port
  • Female End: 1/4in NPT, for standard NPT accessories
  • Component Group: Air Brake & Wheel / Air System Manifolds & Valves

Direct Replacement & Cross-Reference Numbers:

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

  • Parker Interchange: 222P-4-MI14, 222P4MI14
  • Automann Distributor #: 177.9120BM14

Technical Specifications

  • Component Type: Brass Metric-to-NPT Thread Adapter
  • Male Thread: M14x1.5 with O-Ring
  • Female Thread: 1/4in NPT
  • Body Material: Brass
  • Compliance: DOT-approved, meets FMVSS 571.106 for brake circuits
  • Application: Universal
  • UPC: 889626719134
  • Product Level: Fleet Standard Aftermarket
  • Brand: Automann (Distributed by FleetPro Parts & Tires)
Key features
  • Metric Port to NPT Accessory: Lets a metric M14x1.5 valve body, boss or dryer port feed a standard 1/4 in NPT gauge, hose end or accessory line.
  • O-Ring Sealed Male Thread: Seals on the O-ring face instead of the threads, so there is no tape, no dope and no guessing past finger tight.
  • DOT / FMVSS 571.106 Compliant: Approved for brake circuits, so the repair passes inspection instead of failing it.
  • 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.
  • Parker Interchange: Crosses directly to Parker 222P-4-MI14, also listed as 222P4MI14.
Specifications
Component Type
Brass Metric-to-NPT Thread Adapter
Male Thread
M14x1.5 with O-Ring
Female Thread
1/4in NPT
Body Material
Brass
Compliance
DOT-approved, meets FMVSS 571.106 for brake circuits
Application
Universal
UPC
889626719134
Product Level
Fleet Standard Aftermarket
Questions
Will this fit my truck?
This part fits Universal - Class 8 tractors and commercial trailers, Air brake plumbing on tractors and trailers, Adapts a metric M14x1.5 port to a 1/4in NPT accessory. Always confirm your year, make and model before ordering.
What part numbers does it replace?
Yes. It is a direct replacement that interchanges with Parker 222P-4-MI14, Parker 222P4MI14.
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.