This page lists the HPS AN Male to Female Expander Adapter Fitting [Straight] [AN -4 to -6] (Aluminum, Black), including what it fits and what we check before dispatch.
![HPS AN Male to Female Expander Adapter Fitting [Straight] [AN -4 to -6] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/AN951_1_f344e81b-811d-4be5-818d-532bac736f23-1.jpg)
Inner diameter must match the fitting exactly, since eyeballing sizes is how leaks begin. Re check clamp torque after the first few heat cycles.
The hps an male to female expander adapter listed here is checked against your vehicle before dispatch.
Every hps an male to female expander adapter order goes through the same fitment review.
Ordering the hps an male to female expander adapter takes a minute and the confirmation reaches you straight away.
Details that matter
- Material: Aluminum
- Finish: Black
- Category: AN Fitting Components
- Price: $19.72 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
Parcels leave our USA warehouse promptly and arrive protected, because packaging failures are returns waiting to happen.
Before you start the job, the Car Care Council maintenance tips is worth five minutes.
Buyer questions
Is fitment guaranteed on this listing?
We verify every doubtful order by hand. Give us the year, make, model and engine option and we will confirm compatibility in one reply.
What are the shipping times?
Most orders dispatch within one business day. You receive tracking by email the moment the parcel is handed to the carrier.
What happens if it arrives damaged?
If the part does not fit, message our support desk with the order number and we will arrange an exchange or refund. Keep the packaging until the test fit is done.
How do you verify this part?
We verify diameter and reinforcement specification on every hose order.
![HPS AN Male to Metric Adapter Fitting [Straight] [-6 to M20 x 1.5] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/AN816-06-X_pic1_1_9ea8f01c-f6ee-43ae-9912-654e10e73c03-300x300.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 NPT Allen Plug Fitting [1/8 NPT] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/AN932_1_11e3bb56-b4df-4954-84cd-0d354b2dd8ff-300x300.jpg)
![HPS AN Male to Metric Adapter Fitting [Straight] [-6 to M14 x 1.5] (Aluminum, Black)](https://partsmithco.com/wp-content/uploads/2026/07/AN816-06-X_pic1_1_ef8cf05a-8f9b-4a44-938e-d86cae0e4307-300x300.jpg)
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