1/8 npt plug
Skip itPrices mostly outside the sweet spot ($3.97–$10.82) — this niche doesn't clear our bar today.
Conversion
Incredible17.3%search→purchase rate — share of searches ending in a sale
Review moat
Great154.36avg incumbent reviews — the moat a new listing must climb
Returns
Great1.7%return rate — above 5% kills the launch gate
Brand share
Good69%top-5 brand share — brands hold most of the demand
Growth
Okay+17.4%90-day search growth — must beat 0% to launch
Competition
Okay60%top-5 click share — leaders hold, buyers still browse
Quality gap
Bad4.6★avg incumbent rating — lower means beatable quality
Avg price
Bad$7.27avg listing price — sweet spot $15–$100
Market size
Bad$47K$47K/yr · 38K searches
Price range
Bad$3.97–$10.82cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United States niche tracking, 1/8 npt plug is a $47K/yr Amazon United States market (38K searches/yr). The top 5 brands hold 69% of demand. Demand peaks in Apr. Verdict: Skip it — 47/100.
Data updated Jul 10, 2026 · scored weekly · How we score niches
1/8 npt plug market data
- Units sold / yr
- 6K–8K
- avg 250–500/product
- Revenue / yr
- $44K–$58K
- units × avg price
- Conversion rate
- 17.3%
- Avg BSR
- #936
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 86%
- Out of stock
- 0.0%
- Avg brand age
- 47 months
- Avg seller age
- 222 days
Competition & brand share
The top 5 products take 60% of clicks — established leaders, but buyers still shop beyond them.Brands
17 rising
Sellers
19
Top-5 brand share
69%
Top 20: 100%
Top-5 click share
60%
Top 20: 98%
Open market
24%
- Podavelle19%
- Sliverdew17%
- EVIL ENERGY14%
- Legines10%
- CX WONDERLAND8%
- Bonsicoky7%
Demand & seasonality
Weekly Amazon search volume, last 62 weeks — +17.4% search growth over the last 90 days.Peak months: Apr · busiest ÷ quietest = 1.6×
Top 1/8 npt plug search terms
- 1/8 npt plug31K/yr
- 1/8 pipe plug4K/yr
- 1/8 plug2K/yr
Top 1/8 npt plug 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 22 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
1/8 NPT Male Plug Fitting Set 10 PCS Brass Plug Hex Counter Sunk Plug for Closing the End of Internal Hex Socket Thread Socket Plug Kit
Sliverdew$6.034.7★294 rev
Podavelle 1/8 NPT Male Thread Allen Head Socket Pipe Plug Fitting Aluminum Black Pack of 2
Podavelle$9.864.7★364 rev
EVIL ENERGY 1/8 NPT Plugs Aluminum Socket Allen Head Black Pack of 2
EVIL ENERGY$9.684.5★159 rev
Legines Solid Brass Pipe Fitting 1/8 NPT Male Square Head Plug (5 pcs)
Legines$5.994.6★241 rev
Bonsicoky 5 PCS 1/8 NPT Male Thread Pipe Fitting with Tape - 304 Stainless Steel Internal Hex Pipe Fitting for Sealing Pipe Port
Bonsicoky$4.864.4★13 rev
Newest
by launch date
10 Pcs 1/8 NPT Male Pipe Plug Set Brass Hex Counter Sunk Plugs for Closing the End of Pipe
Posocco$4.075 rev
Aoserge 5 PCS 1/8 NPT Male Pipe Plug Fitting Set - Brass Hex Counter Sunk Plugs with Internal Hex Socket for Secure Pipe End Closure Heavy Duty Threaded Plugs for Plumbing Industrial
Aoserge$3.973 rev
5 Pcs 1/8 NPT Plug Outer Hex Head Thread Pipe Plug Fitting 1/8 NPT Male 304 Stainless Steel Hex Head Screw Pipe Plugs Adapter Connector
SynHHergyx$6.272 rev
2 Pack Brass Pipe Plug 1/8 NPT Male Outer Hex Head Socket Plug Fitting for Plumbing by CX WONDERLAND
CX WONDERLAND$4.9936 rev
M METERXITY 2-Pack Inner Hex Head Pipe Fitting Plug 1/8 NPT 304 Stainless Steel Socket Bung Plug with Sealing Ring for Terminate Pipe Ends/Replacement Drains
M METERXITY$5.937 rev
Trending
90-day click momentum10 Pcs 1/8 NPT Male Pipe Plug Set Brass Hex Counter Sunk Plugs for Closing the End of Pipe
Posocco$4.075.0★
M METERXITY 2-Pack Inner Hex Head Pipe Fitting Plug 1/8 NPT 304 Stainless Steel Socket Bung Plug with Sealing Ring for Terminate Pipe Ends/Replacement Drains
M METERXITY$5.935.0★
2 Pack Brass Pipe Plug 1/8 NPT Male Outer Hex Head Socket Plug Fitting for Plumbing by CX WONDERLAND
CX WONDERLAND$4.994.7★
Aoserge 5 PCS 1/8 NPT Male Pipe Plug Fitting Set - Brass Hex Counter Sunk Plugs with Internal Hex Socket for Secure Pipe End Closure Heavy Duty Threaded Plugs for Plumbing Industrial
Aoserge$3.975.0★
2pcs 1/8 NPT Male Brass Pipe Plug Counter Sunk Internal Hex Head by CX WONDERLAND
CX WONDERLAND$3.994.7★
What buyers say about 1/8 npt plug
What buyers praise and complain about, mined from review topics.What buyers love
“Good Fit”
“Product quality was as advertised”
“Worked great”
“Excellent deal and Price”
“Worked as described”
“So far they are holding very well”
“Works perfectly for the gauge port on Aeromotive fuel pressure regulators”
“Also they will never rust”
What buyers complain about
“Just remember to use the appropriate tools because these are soft metal”
“Delicate”
“About as expected however I cracked the first one at the hex drive”
Top return reasons
Common questions
- Is 1/8 npt plug profitable to sell on Amazon United States?
- The niche generates $47K/yr across 22 tracked products. 0 of 5 products launched in the last 360 days are still selling. 90-day search growth is +17.4%. Flapen's verdict: Skip it (47/100).
- How competitive is the 1/8 npt plug niche?
- 17 brands and 19 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 69% of demand.
- What do buyers complain about in 1/8 npt plug?
- Top complaints mined from reviews: Metal Quality, Strength, Durability. The return rate is 1.7%.
- When does demand for 1/8 npt plug peak?
- Demand peaks in Apr; the busiest month runs 1.6× the quietest.
- What does it cost to enter the 1/8 npt plug niche?
- Listings span $3.97–$10.82; the average listing price is $7.27 (sweet spot $15–$100). The average incumbent carries 154 reviews — the moat a new listing must climb.