Order the HPS NPT Hex Plug Fitting [3/8 NPT] (Aluminum, Black) from a parts team that verifies fitment before anything leaves the building.
![HPS NPT Hex Plug Fitting [3/8 NPT] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/AN933_1_1c08241a-c2ec-4139-bfbd-8142d10147e2.jpg)
Inner diameter must match the fitting exactly, since eyeballing sizes is how leaks begin. Route clear of heat sources and moving components.
Shops order the hps npt hex plug fitting from us in volume because the data on the page is accurate.
If your build is unusual, tell us and we will confirm the hps npt hex plug fitting against it.
The hps npt hex plug fitting ships protected, because a damaged part helps nobody.
Details that matter
- Material: Aluminum
- Finish: Black
- Category: AN Fitting Components
- Price: $15.51 with free shipping over $99
- Availability: in stock, dispatched from the USA
Ask before you order and the only surprise on installation day is how smoothly it goes.
Also worth a look: Hoses & Fittings · HPS AN Male to Male Union Adapter AN Fitting [Straight] [-4] (Aluminum, Black) · HPS AN Male to Male Union Adapter AN Fitting [Straight] [-2] (Aluminum, Black) · full catalog
Orders are checked against your vehicle details before they are sealed, then dispatched quickly.
Before you start the job, the Car Care Council maintenance tips is worth five minutes.
Before you order
Can you check fitment before I order?
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.
How quickly can I get this?
Same business day dispatch applies to orders placed before the early afternoon cutoff, with tracking that updates at every carrier scan.
Can I return this part?
Parts are covered against defects for the period stated on this page, and non defect returns follow our standard returns window.
How do you verify this part?
Lines and fittings are checked for pressure rating, inner diameter and ply count before shipping.
![HPS AN 3-Way Tee Adapter (Tee with female on run) Fitting [Tee] [AN -8] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/AN9261_1_be005c51-8bd2-46a9-92b6-7e329201ec21-300x300.jpg)
![HPS AN Male to NPT Adapter Fitting [Straight] [-8 to 1/4 NPT] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/AN816-06-X_pic1_1_8fbe7cf9-52b7-41cb-9b7c-e7396fcd09ae-300x300.jpg)
![HPS AN Female Flare Cap Fitting [Straight] [AN -16] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/AN929_1_c735b1de-9c47-4378-8770-106277ec99ca-300x300.jpg)
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