PartSmith Co. lists the HPS Hard Line AN Tube Nut (Open Ended Female) [Straight] [AN -4] (Aluminum, Black) with real inventory, honest specs and fast USA dispatch.
![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.jpg)
Petroleum contact requires the correct lining, so fuel and oil routing needs the right specification. Re check clamp torque after the first few heat cycles.
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.
Part details
- Material: Aluminum
- Finish: Black
- Category: AN Fitting Components
- Price: $13.76 with free shipping over $99
- Availability: in stock, dispatched from the USA
If the application text leaves any doubt, message us with the VIN and we will rule on fitment before the box is sealed.
More in this department: Hoses & Fittings · HPS AN Female Bulkhead Jam Nut AN Fitting [Straight] [-10] (Aluminum, Black) · HPS AN Male to Male Union Adapter AN Fitting [Straight] [-8] (Aluminum, Black) · full catalog
Fast dispatch matters when a vehicle is off the road, which is why we prioritize same day picking.
For safety and service guidance from outside the aftermarket, see the Car Care Council maintenance tips.
Quick answers
Is fitment guaranteed on this listing?
Our parts team confirms fitment before the box is sealed. Contact us with your vehicle details and we will settle it in advance.
Do you ship the same day?
Same business day dispatch applies to orders placed before the early afternoon cutoff, with tracking that updates at every carrier scan.
What is the return policy?
Returns are handled in one reply for most cases. Keep your order confirmation, since it is the only proof of purchase we need.
Is this checked before shipping?
We verify diameter and reinforcement specification on every hose order.
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![HPS NPT Allen Plug Fitting [1/4 NPT] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/AN932_1_fb2df01f-9eb8-4975-89d8-8afd92a49ee4-300x300.jpg)
![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)
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