3/8" DOT/PTC – ½" NPT Straight
Specs & Fitment Add-On Parts Ask a Specialist

3/8" DOT/PTC – ½" NPT Straight

$12.95

3/8-inch DOT push-to-connect to 1/2-inch NPT straight fitting for classic truck air ride builds, stepping a 1/2-inch tank or compressor port down to 3/8-inch air line.

  • Half inch port to 3/8 inch line in one step - no bushing stack and no extra joints to seal.
  • Push-to-connect line side - the tube pulls for service without cutting.
  • Largest thread in the range - the fitting for a big tank bung or a compressor outlet.
  • Kit-matched part - the same straight Accuair supplies inside its systems.
  • Thirteen dollars - worth having spare rather than stalling an install over a fitting.

Install Level: Easy

SKU: AA-3657

⚠️
WARNING: Handling passenger or off-highway motor vehicle parts can expose you to chemicals such as phthalates and lead. Learn more.
3/8" DOT/PTC – ½" NPT Straight
$12.95

Finish the Build Right

Parts our crew pairs with this kit so your swap goes together right the first time.

1–2 of 4
  • Seamless Air Tank 18" x 6.625", 5 x 1/4" NPT Ports $174.95 Details for Seamless Air Tank 18" x 6.625", 5 x 1/4" NPT Ports
  • Loctite 565 Anaerobic Thread Sealant (6ml tube) $13.95 Details for Loctite 565 Anaerobic Thread Sealant (6ml tube)
  • 3/8" DOT Air Line Fitting Kit w/ Filter/Trap $197.95 Details for 3/8" DOT Air Line Fitting Kit w/ Filter/Trap
  • Plastic Airline Cutter $16.95 Details for Plastic Airline Cutter

Installing an air suspension system includes many different fittings, sensors, and wiring harnesses. When something as small as a fitting gets damaged, it could put the whole install on pause until you source the right part. AccuAir knows that not every install can go perfectly, so we offer replacement parts to ensure you can complete your install with hard to find kit components for damaged parts. This 3/8" DOT/PTC - 3/8" NPT Straight is a direct replacement for the 3/8" DOT/PTC - 3/8" NPT Straight found within your AccuAir air suspension system components. Whether your 3/8" DOT/PTC - 3/8" NPT Straight is damaged, has gone missing, or you simply need a new one for your install, AccuAir has you covered with the correct components for a clean and high-quality install.

Accuair part number AA-3657
Type: straight adapter fitting
Port 1: 3/8 inch DOT / PTC tube
Port 2: 1/2 inch NPT male per the product title
Sold as: single fitting
Listed price 12.95 USD
The listing body text describes a 3/8 inch NPT fitting and does not match this title
No body material; hex size; overall length or pressure rating is published on this listing
Universal air suspension part. It fits a 1/2 inch NPT port and a 3/8 inch DOT line rather than a chassis.
Use where a tank bung; manifold port or compressor outlet is cut for 1/2 inch NPT.
No Gen: tag; year or model application is published on this listing so generations are left blank rather than guessed.

Talk to a Parts Specialist

Not sure it fits your truck, or planning a bigger build? Our parts specialists will help you get the right parts the first time.

Tip: have your truck's year, make and model handy.

Email info@fatfender.com Call (480) 621-6072

Hours: Mon–Thu 8am–5pm · Fri 8am–2pm (Arizona Time)

Reach out after hours and we'll get back to you the next business day.

SEARCH OUR STORE

Engines, A/C accessories, steering, brakes, & more. Get everything you need for your truck restoration at home.