6an to 3/8 barb
Skip itBrand-locked demand (top 5 brands take 95% of clicks) — this niche doesn't clear our bar today.
Conversion
Incredible15.6%search→purchase rate — share of searches ending in a sale
Review moat
Great384.59avg incumbent reviews — the moat a new listing must climb
Returns
Good2.6%return rate — above 5% kills the launch gate
Avg price
Good$13.11avg listing price — sweet spot $15–$100
Growth
Good+23.0%90-day search growth — must beat 0% to launch
Price range
Okay$7.92–$20.71cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Bad71%top-5 click share — a locked-up shelf
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Market size
Bad$56K$56K/yr · 27K searches
Brand share
Bad95%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, 6an to 3/8 barb is a $56K/yr Amazon United States market (27K searches/yr). The top 5 brands hold 95% of demand. Verdict: Skip it — 42/100.
Data updated Jul 10, 2026 · scored weekly · How we score niches
6an to 3/8 barb market data
- Units sold / yr
- 4K–5K
- avg 100–250/product
- Revenue / yr
- $52K–$66K
- units × avg price
- Conversion rate
- 15.6%
- Avg BSR
- #189
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 88%
- Out of stock
- 2.6%
- Avg brand age
- 35 months
- Avg seller age
- 240 days
Competition & brand share
The top 5 products capture 71% of clicks — a locked-up shelf that new listings rarely crack.Brands
7 falling
Sellers
11
Top-5 brand share
95%
Top 20: 100%
Top-5 click share
71%
Top 20: 100%
Open market
2%
- EVIL ENERGY50%
- Podavelle28%
- Ucreative8%
- TRUCKMETER7%
- CNRAQR3%
- VVORHSBELL3%
- Open — no brand owns it (1 brand, 2%)
Demand
Weekly Amazon search volume, last 11 weeks — +23.0% search growth over the last 90 days.Top 6an to 3/8 barb search terms
- 6an to 3/8 barb16K/yr
- 6an female to 3/8 barb4K/yr
- an6 to 3/8 barb2K/yr
- 6 an to 3/8 barb2K/yr
- 6an to barb2K/yr
Top 6an to 3/8 barb products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 17 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
EVIL ENERGY 6AN Female to 3/8 Barb Hose Fitting Straight Swivel
EVIL ENERGY$10.764.8★673 rev
Podavelle 6AN Male Flare to 3/8 Hose Barb Straight Fitting Adapter Aluminum Black 2PCS
Podavelle$10.984.8★450 rev
EVIL ENERGY 6AN Female to 3/8 Barb Hose Fitting Straight Swivel 2PCS
EVIL ENERGY$17.524.7★325 rev
Ucreative 6AN Straight Push Lock Hose Fitting End Black 2PCS
Ucreative$7.924.8★529 rev
Podavelle 6AN Female to 3/8 Barb Hose Fitting Adapter Straight Swivel Aluminum Black
Podavelle$10.724.8★504 rev
Newest
by launch date
EVIL ENERGY 6AN Female to 3/8 Hose Barb Fitting Adapter
EVIL ENERGY$9.9922 rev
TRUCKMETER 6AN Female to 3/8 Hose Barb Fittings Adapter Black Hard Aluminum Hex Anodized Push On Barb Connector Automotive Accessories Suitable for Vehicle Fuel Oil Line Modification
TRUCKMETER$11.3714 rev
2Pcs Straight 6AN Female to 3/8 Push Lock Hose Fitting End for Rubber Fuel Line Black Hard Two Stage Barb Aluminum Anodized Connector Automotive Accessories for Vehicle Fuel Oil Line Modification
TRUCKMETER$10.67135 rev
Podavelle 6AN Male Flare to 3/8 Hose Barb Straight Fitting Adapter Aluminum Black 2PCS
Podavelle$10.98450 rev
Podavelle 6AN Female to 3/8 Barb Hose Fitting Adapter Straight Swivel Aluminum Black 2PCS
Podavelle$17.48504 rev
Trending
90-day click momentum
VVORHSBELL 6AN to 3/8 Barb Straight Push Lock Hose Fitting End For Rubber Fuel Line Black 2PCS
VVORHSBELL$11.154.7★
EVIL ENERGY 6AN Female to 3/8 Barb Hose Fitting 90 Degree Swivel
EVIL ENERGY$15.574.8★
EVIL ENERGY 6AN Male to 3/8 Barb Push on Fitting Adapter Aluminum 2PCS
EVIL ENERGY$14.744.7★
Podavelle 6AN Female to 3/8 Barb Hose Fitting Adapter Straight Swivel Aluminum Black
Podavelle$10.724.8★
CNRAQR 6AN Female to 3/8 Barb Straight Swivel Fitting Adapter Aluminum Black 4Pcs
CNRAQR$16.714.8★
What buyers say about 6an to 3/8 barb
What buyers praise and complain about, mined from review topics.What buyers love
“Nice item, just as described”
“Perfect fit”
“As described”
“Good for the price”
“No leaks”
“Clean”
“Great quality and clean design”
What buyers complain about
“Just remember to use the appropriate tools because these are soft metal”
“Feels plasticky - I guess it's aluminum”
“Product was used”
Top return reasons
Common questions
- Is 6an to 3/8 barb profitable to sell on Amazon United States?
- The niche generates $56K/yr across 17 tracked products. 90-day search growth is +23.0%. Flapen's verdict: Skip it (42/100).
- How competitive is the 6an to 3/8 barb niche?
- 7 brands and 11 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 95% of demand.
- What do buyers complain about in 6an to 3/8 barb?
- Top complaints mined from reviews: Metal Quality, Material Quality, Product Condition. The return rate is 2.6%.
- What does it cost to enter the 6an to 3/8 barb niche?
- Listings span $7.92–$20.71; the average listing price is $13.11 (sweet spot $15–$100). The average incumbent carries 385 reviews — the moat a new listing must climb.