Overview
The AirLift Accessories Straight Fitting, part number AIR21834, is a straight air line fitting with a female 1/8 inch FNPT thread and a 1/4 inch tube connection, classed as a plug.
The thread size, tube size and fitting type are the facts AirLift gives. The fitting joins a 1/4 inch tube to a female 1/8 inch FNPT port, which makes it a small-diameter air line connection suited to compact air components. No pressure rating, material or finish is published for it.
FNPT stands for female National Pipe Taper, a tapered pipe thread that seals when it is tightened into a matching male port, usually with thread sealant. The 1/4 inch tube end connects the fitting to the air line, so the two ends must match the port and the tubing you already have.
AirLift’s brand text explains that Air Lift Company has developed air spring suspension products since 1949. Its original product, a rubber air spring inserted into a car’s factory coil spring, was created and patented in 1950. Today the company says its load support products are engineered to fit over 540 vehicles and include air helper springs for trucks, RVs, SUVs, CUVs and vans, along with on-board air compressor systems for air spring control. That describes AirLift’s range, not this fitting.
Key features
- Straight fitting with a female 1/8 inch FNPT thread
- 1/4 inch tube connection
- Fitting type: Plug
- From Air Lift Company, an air spring suspension specialist since 1949
- Universal fit; not tied to one vehicle
Air line connections
A small pneumatic fitting like this one carries air between a line and a component, so the thread and seal decide whether the connection holds. Pipe threads seal by tapering into the mating port, which means they need the right amount of thread sealant and the right tightening feel. Over-tightening can crack the port, while under-tightening lets air leak past the threads.
Tubing and fittings should be checked as a set. Cut tubing square, push it fully into the fitting, and use the release collar or retainer as designed. Look for kinks, abrasion and aging on the line, and replace damaged sections rather than patching them. A quick leak check with soapy water after assembly will show any weak connection before the system sees load.
Specifications
| Brand | AirLift |
|---|---|
| Part number | AIR21834 |
| Product type | Straight air fitting |
| Thread | Female 1/8 inch FNPT |
| Tube size | 1/4 inch |
| Fitting type | Plug |
| Fit type | Universal Fit |
| Material, pressure rating and finish | Not published |
Vehicle fitment
No year, model or chassis code applies to this fitting. It is universal fit, meaning it is sized by thread and tube: female 1/8 inch FNPT to 1/4 inch tube.
Match the female 1/8 inch FNPT thread and the 1/4 inch tube size to the port and line in your air system, since a fitting with a different thread or tube size will not connect. Check the pressure limits for your air system before use.
Confirm your vehicle’s year, model and trim before ordering.
