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Brass Hex Plug - 3/8in NPT Port - Eaton 3152X6 Bendix 238807 Parker 218P6 177.9121C
Brass Hex Plug - 3/8in NPT Port - Eaton 3152X6 Bendix 238807 Parker 218P6 177.9121C
Automann

Brass Hex Plug - 3/8in NPT Port - Eaton 3152X6 Bendix 238807 Parker 218P6 177.9121C

In stock
SKU: 177.9121C
$1.24
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Fitment

Fits these trucks

Universal - trucks, tractors and trailersNPT air-brake and air-line connectionsCaps an unused 3/8in NPT port on truck and trailer air lines
Always confirm your year, make & model before ordering.
Part numbers

OEM & interchange numbers

6 cross-refs
Bendix 238807 Eaton 3152X6 Parker 218P6 121C 017055 SPPH6
Direct 1-to-1 replacement for every number above. Tap any number to copy.
Overview

Shut off an open 3/8in air connection with this brass hex plug distributed by FleetPro Parts & Tires. Sized for 3/8in NPT pipe ports, it is the part that goes in when a valve, manifold or reservoir boss is left open after a circuit is removed or re-routed. Shops improvise here constantly - a bolt wrapped in tape, a plug from the wrong thread family - and every one of those improvisations turns into a weeping joint that drags the tanks down overnight and sets off the low-air buzzer on a cold morning. 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.

The Right Thread, The First Time: The 3/8in Brass Plug Advantage

This is standard NPT pipe connection hardware for truck and trailer air-brake and air-accessory plumbing. The 3/8in NPT thread is tapered rather than straight, so it wedges tighter the further it is driven and seals on the thread itself - which is why a correctly sized NPT plug stays dry for years while a mismatched thread never really does.

The brass body handles what lives inside a heavy-duty air system: condensate, compressor oil carryover, road salt and constant vibration. Brass also will not seize into an aluminium or cast valve body the way a steel plug can, so the port can be opened up again later without heat, penetrant and a broken extractor. The hex head drives with a plain wrench or socket, and this plug carries forward the older Automann 177.9038 reference, so a shop working from an older parts list is ordering the same fitting.

At FleetPro Parts & Tires, we know the cheapest part on the truck is often the one holding up the repair. This Automann plug is a direct replacement for highly searched industry numbers including Eaton 3152X6, Bendix 238807 and Parker 218P6.

Vehicle Fitment & Compatibility

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

  • Make/Model: Universal - trucks, tractors and trailers
  • System: NPT air-brake and air-line connections
  • Thread: 3/8in NPT
  • Component Group: Air Brake & Wheel / Air System Manifolds & Valves

Direct Replacement & Cross-Reference Numbers:

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

  • Bendix Interchange: 238807
  • Eaton Interchange: 3152X6
  • Parker Interchange: 218P6
  • Additional Interchange: 121C, 017055, SPPH6
  • Supersedes Automann: 177.9038
  • Automann Distributor #: 177.9121C

Technical Specifications

  • Component Type: Brass Hex Plug
  • Thread: 3/8in NPT
  • Body Material: Brass
  • Application: Universal - air-brake and air-accessory plumbing
  • Replaces Automann #: 177.9038
  • UPC: 889626447181
  • Product Level: Fleet Standard Aftermarket
  • Brand: Automann (Distributed by FleetPro Parts & Tires)
Key features
  • Closes A 3/8in Port Properly: Purpose-made NPT plug instead of the taped bolt or wrong-thread substitute that turns into a weeping air leak.
  • Tapered NPT Seal: The 3/8in NPT thread wedges tighter as it is driven and seals on the thread itself, so the joint stays dry through vibration and heat cycles.
  • Brass Beats Steel Here: Brass handles condensate, compressor oil and road salt, and will not seize into a cast valve body when the port has to be opened again.
  • Carries The Older Reference: Supersedes Automann 177.9038, so a shop ordering from an older parts list still gets the correct fitting.
  • Bendix And Eaton Interchange: Direct replacement for Bendix 238807, Eaton 3152X6 and Parker 218P6.
Specifications
Component Type
Brass Hex Plug
Thread
3/8in NPT
Body Material
Brass
Application
Universal - air-brake and air-accessory plumbing
Replaces Automann #
177.9038
UPC
889626447181
Product Level
Fleet Standard Aftermarket
Questions
Will this fit my truck?
This part fits Universal - trucks, tractors and trailers, NPT air-brake and air-line connections, Caps an unused 3/8in NPT port on truck and trailer air lines. Always confirm your year, make and model before ordering.
What part numbers does it replace?
Yes. It is a direct replacement that interchanges with Bendix 238807, Eaton 3152X6, Parker 218P6, 121C, 017055, SPPH6.
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.