Buying the HPS NPT Allen Plug Fitting [3/8 NPT] (Aluminum, Black) should be simple, so here are the facts without the marketing noise.
![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-4.jpg)
Reinforcement ply count determines burst strength, which matters most on boosted applications. Measure inner diameter at the fitting rather than estimating by eye.
Our team knows the hps npt allen plug fitting well, so ask if anything about the specification is unclear.
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.
Quick specs
- Material: Aluminum
- Finish: Black
- Category: AN Fitting Components
- Price: $15.51 with free shipping over $99
- Availability: in stock, dispatched from the USA
Our fitment desk exists precisely for the listings where the specification is easy to misread.
Continue browsing: Hoses & Fittings · HPS AN Female Bulkhead Jam Nut AN Fitting [Straight] [-4] (Aluminum, Black) · HPS AN Female Bulkhead Jam Nut AN Fitting [Straight] [-2] (Aluminum, Black) · full catalog
Orders placed before early afternoon usually leave our USA warehouse the same business day, with tracking emailed at label creation.
Background reading that is not trying to sell you anything: the NHTSA vehicle safety hub.
Questions we get about this part
Can you check fitment before I order?
Share your vehicle details with our team and we cross reference this listing before dispatch. Anything doubtful gets a message from us rather than a shipment.
How fast does this ship?
Dispatch is normally the same or next business day, and heavy items travel on freight with a booked delivery window.
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.
Is this checked before shipping?
Lines and fittings are checked for pressure rating, inner diameter and ply count before shipping.
![HPS AN Male to NPT Adapter Fitting [Straight] [-8 to 1/2 NPT] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/AN816-06-X_pic1_1_b76d947d-1e43-4e38-b986-a8f6682cdca6-300x300.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)
![HPS AN Male to Metric Adapter Fitting [Straight] [-6 to M22 x 1.5] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/AN816-06-X_pic1_1_84a0bab4-582d-4dc1-a176-6237879f811f-300x300.jpg)
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