Looking for the HPS Hard Line AN Tube Nut (Open Ended Female) [Straight] [AN -4] (Aluminum, Black)? It is on the shelf here, checked and ready to ship.
![HPS Hard Line AN Tube Nut (Open Ended Female) [Straight] [AN -4] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/AN818_1_c25f2a27-cb3f-4d95-8125-ed60ddde8c91-1.jpg)
Inner diameter must match the fitting exactly, since eyeballing sizes is how leaks begin. Measure inner diameter at the fitting rather than estimating by eye.
If your build is unusual, tell us and we will confirm the hps hard line an tube nut against it.
The hps hard line an tube nut ships protected, because a damaged part helps nobody.
Drivers choose the hps hard line an tube nut here for honest specification detail and quick dispatch.
The important numbers
- Material: Aluminum
- Finish: Black
- Category: AN Fitting Components
- Price: $13.76 with free shipping over $99
- Availability: in stock, dispatched from the USA
Fitment questions get answered by people who work with these parts daily, usually the same business day.
Related parts: Hoses & Fittings · HPS AN Male to Male Union Adapter AN Fitting [Straight] [-8] (Aluminum, Black) · HPS AN Male to Male Union Adapter AN Fitting [Straight] [-6] (Aluminum, Black) · full catalog
Orders are checked against your vehicle details before they are sealed, then dispatched quickly.
If you want independent guidance before ordering, the NHTSA vehicle safety hub is a useful reference.
Buyer questions
What do you need to verify fitment?
The application text on this page lists what the part serves. If your vehicle is not clearly covered, send the VIN and we will rule on it before you pay.
When will my order dispatch?
Your tracking link arrives by email at label creation and stays live until delivery, so you can follow the parcel the whole way.
Can I return this part?
Report any transit damage with a photo and we will send a replacement or refund you. We handle the carrier claim ourselves.
What quality checks does this get?
We verify diameter and reinforcement specification on every hose order.
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![HPS Push-on Hose End to AN Female Fitting [120 Degree] [-10] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/150-120_1_2ac48160-6f50-4c53-8c37-0cf776a30fac-300x300.jpg)
![HPS Push-on Hose End to AN Female Fitting [120 Degree] [-8] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/150-120_1_b7ae2165-4f89-472c-a9fc-72ba3e09b875-300x300.jpg)
![HPS Push-on Hose End to AN Female Fitting [120 Degree] [-12] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/150-120_1_635e984b-3fc3-4cc7-aaac-b24669ef133f-300x300.jpg)
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