How do I know a part fits my truck?

Every listing shows the truck make, model years, side (left/right) and OEM cross-reference numbers. Match any of your OEM numbers to the listing, or send us your number and we will confirm fitment.

Do you ship the same day?

Orders placed before 12PM Central on business days ship the same day from our US warehouse. Transit is typically 2–5 business days depending on your state.

What is your return policy?

30-day returns on unused parts in original packaging. Wrong part shipped by us? We cover the return label and ship the correct one first.

Do you offer fleet or shop pricing?

Yes. Business accounts get tiered pricing, saved reorders and a dedicated line. Open a business account to see your pricing and order online.

Are these OEM or aftermarket parts?

We sell quality aftermarket parts cross-referenced to OEM numbers, plus select OEM-grade lines. Brand and grade are shown on every listing.

Can I order by part number?

Yes — type any part number or OEM cross reference into the search bar. If it is not listed, send it to us and we will source it.

Brass Female Tee 3/8" NPT (3700X6)

Shop-grade fitting for truck and trailer air-brake and air-accessory plumbing — standard NPT pipe connection hardware. Ships from our Illinois warehouse.

Each End Fits 3/8in Pipes
Replaces 177.9007

Brand
- Automann
Quality Tier
- Standard
OEM Reference
- Eaton 3700X6
Condition
- New
Warranty
- 1-Year FleetPro Warranty

Wholesale pricing for approved accounts

Open a FleetPro business account to see fleet pricing and order online. Repair shops, trucking companies & dealers welcome.

Request a business account

Terms and Conditions
30-day returns on unused parts
Same-day shipping on orders before 12PM CT

Internal Reference: 177.9101C

Same-day shipping before 12PM CT from our Illinois warehouse
Part requests and quotes answered within one business hour
30-day returns
1-Year FleetPro Warranty
Wholesale and fleet pricing for approved business accounts
We speak English, Russian, Ukrainian, Romanian, Bulgarian, French and Polish

Air-Line Fitting, Specifications & Fitment

Shop-grade fitting for truck and trailer air-brake and air-accessory plumbing — standard NPT pipe connection hardware.

Specifications

Each End Fits 3/8in Pipes
Replaces 177.9007
Brand: Automann
Grade: Fleet Standard

Where it's used

NPT air-brake and air-line connections on trucks, tractors and trailers. Replaces Eaton 3700X6, Parker 2203P6.

Product Details

Brand	Automann
Quality Tier	Standard
OEM Reference	Eaton 3700X6
Condition	New
Warranty	1-Year FleetPro Warranty