The HPS NPT Allen Plug Fitting [3/8 NPT] (Aluminum, Black) is in stock at PartSmith Co. and ready for dispatch from our USA warehouse.
Inner diameter must match the fitting exactly, since eyeballing sizes is how leaks begin. Use constant tension or lined clamps so the hose surface survives heat cycles.
Stock of the hps npt allen plug fitting is live on this page rather than estimated.
Shops order the hps npt allen 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 allen plug fitting against it.
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
We would rather answer a question before you buy than process a return afterward, so ask freely.
See also: Hoses & Fittings · HPS AN Female Bulkhead Jam Nut AN Fitting [Straight] [-12] (Aluminum, Black) · HPS AN Female Bulkhead Jam Nut AN Fitting [Straight] [-10] (Aluminum, Black) · full catalog
Our warehouse team packs the way they would want their own parts to arrive.
General guidance on this system is published in the Car Care Council maintenance tips.
Questions we get about this part
Is fitment guaranteed on this listing?
Trim level, engine option and drive type decide most fitment questions. Send those three details or the VIN and we will check them for you.
Do you ship the same day?
We ship from a USA warehouse with quick dispatch, and delivery estimates appear at checkout once you enter your address.
What if it does not fit?
Returns are handled in one reply for most cases. Keep your order confirmation, since it is the only proof of purchase we need.
What quality checks does this get?
Lines and fittings are checked for pressure rating, inner diameter and ply count before shipping.
![HPS NPT Allen Plug Fitting [3/8 NPT] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/AN932_1_6be249de-b49f-4373-8667-06e8edb296af.jpg)
![HPS AN 3-Way Tee Adapter (Tee with female on run) Fitting [Tee] [AN -6] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/AN9261_1_13ceb207-d699-42c1-9a48-035b83f670cc-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 Male to Metric Adapter Fitting [Straight] [-8 to M14 x 1.25] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/AN816-06-X_pic1_1_2d43096e-0176-48a6-aafa-d4ad5b2e739f-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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