3/8 Npt
FailThe top 5 brands take 100% of clicks, so 3/8 Npt is a Fail.
- Flapen Score
- 34 / 100Ranks 6,811 of 7,287 Automotive niches · −15 vs the category median of 4934
- Market size
- $59K/yr41K searches / yr
- 90-day growth
- +7.5%search demand this quarter
- Competition
- 80%top-5 click share · 4 brands · 7 sellers
Flapen Score
3/8 Npt against its category
The dotted line is the Automotive average. Past it, 3/8 Npt is stronger. Inside it, weaker.
Market
The 3/8 Npt market on Amazon at a glance
Shoppers on Amazon United States searched for 3/8 Npt 41K times last year and spent an estimated $59K. All 4 brands take every click. Flapen scores it 34 out of 100, a Fail.
01 · Demand
An estimated 12.2% of those searches ended in a purchase.
Shoppers searched for this 41K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 12.2% of those searches ended in a purchase. Searches in the last 90 days moved +7.5% against the 90 days before. Searches, conversion and average price together put the market at an estimated $59K a year.
- Searches, last 12 months
- 41K
- Growth, 90 days vs prior 90
- +7.5%
- Conversion, latest week
- 12.2%
- Market size, estimated
- $59Ka year
- Top search term
- 3/8 npt to 6an11K searches a year
02 · Price
A sale here is worth $11.93.
Listings sell for $11.93 on average, from $5.33 to $21.33. Amazon reports units sold in ranges. This niche sold 4K to 5K a year. The average listing sells 500 to 750 of them. At $11.93 that is $6K to $9K a year per listing.
- Average price
- $11.93under the $15 to $100 sweet spot
- Price range
- $5.33–$21.33
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 4K–5K
- Units per listing a year
- 500–750
- Revenue per listing a year
- $6K–$9K
- Returns
- 2.8%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is ads.
100% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #12 within Fuel System. It carries 1,000 reviews at 4.76 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 100%
- Prime listings
- 100%
- Out of stock, average day
- 0.0%
- Average rank
- #12in Fuel System
- Average rating
- 4.76 starsAmazon United States average 4.42 stars
- Average reviews
- 1,000per listing
- Listings tracked
- 10
04 · Newcomers
Brands here are settling in.
The brands on the shelf have sold for 47 months on average, so the names here are settling in.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 47 months
Products
Top 3/8 Npt products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 10, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
EVIL ENERGY 6AN Male Flare to 3/8 NPT Pipe Fitting Adapter Aluminum Straight Black 2PCS
- Price
- $12.78
- Rating
- 4.8/5
- Reviews
- 2,149
- Age
- 3y ago

Lanstixr 6AN Male Flare to 3/8 NPT Male Hose Pipe Fitting Adapter Union Connector Aluminum Straight Black Anodized 2PCS
- Price
- $7.45
- Rating
- 4.6/5
- Reviews
- 33
- Age
- 1y ago

EVIL ENERGY 6AN Male Flare to 3/8 NPT Pipe Fitting Adapter Aluminum Straight Black 4PCS
- Price
- $21.33
- Rating
- 4.8/5
- Reviews
- 207
- Age
- 2y ago

Breezliy 6AN Male Flare to 3/8 NPT Pipe Fitting Adapter Aluminum Straight Black 2PCS
- Price
- $7.83
- Rating
- 4.6/5
- Reviews
- 313
- Age
- 4y ago

EVIL ENERGY 6AN to 3/8 NPT Male 90 Degree Fitting Adapter Aluminum
- Price
- $10.93
- Rating
- 4.8/5
- Reviews
- 1,393
- Age
- 4y ago
Trending
estimated 90-day click momentum
EVIL ENERGY 3/8 NPT Male to 3/8 Barb Fitting Adapter Straight Aluminum Black
- Price
- $9.82
- Rating
- 4.8/5
- Reviews
- 426
- Age
- 1y ago

Lanstixr 6AN Male Flare to 3/8 NPT Male Hose Pipe Fitting Adapter Union Connector Aluminum Straight Black Anodized 2PCS
- Price
- $7.45
- Rating
- 4.6/5
- Reviews
- 33
- Age
- 1y ago

EVIL ENERGY 6AN to 3/8 NPT Male 90 Degree Fitting Adapter Aluminum 2PCS
- Price
- $19.47
- Rating
- 4.8/5
- Reviews
- 2,149
- Age
- 2y ago

EVIL ENERGY 6AN Male to 3/8 Hardline Compression Fitting Adapter Aluminum Black 2PCS
- Price
- $15.39
- Rating
- 4.8/5
- Reviews
- 764
- Age
- 3y ago

EVIL ENERGY 6AN Male Flare to 3/8 NPT Pipe Fitting Adapter Aluminum Straight Black
- Price
- $8.98
- Rating
- 4.8/5
- Reviews
- 1,393
- Age
- 7y ago
Newest
by launch date
EVIL ENERGY 3/8 NPT Male to 3/8 Barb Fitting Adapter Straight Aluminum Black
- Price
- $9.82
- Rating
- 4.8/5
- Reviews
- 426
- Age
- 1y ago

Lanstixr 6AN Male Flare to 3/8 NPT Male Hose Pipe Fitting Adapter Union Connector Aluminum Straight Black Anodized 2PCS
- Price
- $7.45
- Rating
- 4.6/5
- Reviews
- 33
- Age
- 1y ago

EVIL ENERGY 6AN Male Flare to 3/8 NPT Pipe Fitting Adapter Aluminum Straight Black 4PCS
- Price
- $21.33
- Rating
- 4.8/5
- Reviews
- 207
- Age
- 2y ago

EVIL ENERGY 6AN to 3/8 NPT Male 90 Degree Fitting Adapter Aluminum 2PCS
- Price
- $19.47
- Rating
- 4.8/5
- Reviews
- 2,149
- Age
- 2y ago

EVIL ENERGY 6AN Male Flare to 3/8 NPT Pipe Fitting Adapter Aluminum Straight Black 2PCS
- Price
- $12.78
- Rating
- 4.8/5
- Reviews
- 2,149
- Age
- 3y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 80% of clicks. A locked shelf that new listings rarely crack.
Brands
4 falling
Sellers
7
Est. top-5 brand share
100%
Top 20: 100%
Est. top-5 click share
80%
Top 20: 100%
Open market
0%
- EVIL ENERGY80%
- lanstixr8%
- Breezliy6%
- SUNGATOR5%
Demand
3/8 Npt search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.3× · 9 of 12 months tracked
Search terms
Top 3/8 Npt search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- 3/8 npt to 6an11K/yr
- 3/8 npt9K/yr
- 3/8 brass fittings6K/yr
- 3/8 fitting5K/yr
- 6an to 3/8 npt4K/yr
- 3/8 to 6an3K/yr
- 3/8 npt fitting3K/yr
Reviews and returns
What reviews say buyers love and hate about 3/8 Npt
We read the reviews and the return reasons for every product selling here.
“they all leaked”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
17 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common 3/8 Npt questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









