---
title: "1/8 Npt Plug — $47K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/1-8-npt-plug"
last_updated: "2026-08-09T03:38:34.885Z"
locale: en
meta:
description: "Niche score 47/100 · $47K/yr market · 38K searches/yr · $7.27 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 47/100 · $47K/yr market · 38K searches/yr · $7.27 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "1/8 Npt Plug — $47K/yr Amazon US Niche (2026) - Flapen"
---
# **1/8 npt plug**
**Skip it**
Prices mostly outside the sweet spot ($3.97–$10.82) — this niche doesn't clear our bar today.
Market size 12Growth 47Conversion 98Competition 42Returns 80Price range 0Avg price 20Brand share 61Review moat 92Quality gap 24
**Conversion**
**Incredible****17.3%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Great****154.36**
avg incumbent reviews — the moat a new listing must climb
**Returns**
**Great****1.7%**
return rate — above 5% kills the launch gate
**Brand share**
**Good****69%**
top-5 brand share — brands hold most of the demand
**Growth**
**Okay****+17.4%**
90-day search growth — must beat 0% to launch
**Competition**
**Okay****60%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Bad****4.6★**
avg incumbent rating — lower means beatable quality
**Avg price**
**Bad****$7.27**
avg listing price — sweet spot $15–$100
**Market size**
**Bad****$47K**
$47K/yr · 38K searches
**Price range**
**Bad****$3.97–$10.82**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%")
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 ~~](https://flapen.com/research/methodology)
## **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.
1K800Spike '26 seasonMayJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: Apr · busiest ÷ quietest = 1.6×
[**Open Trend **](https://flapen.com/research/us/automotive/1-8-npt-plug/trend)
## **Top 1/8 npt plug search terms**
- **1/8 npt plug**31K/yr+20.5%15.5% conv. - **1/8 pipe plug**4K/yr+1.5%15.0% conv. - **1/8 plug**2K/yr+5.6%11.1% conv. [**All search terms **](https://flapen.com/research/us/automotive/1-8-npt-plug/search-terms)
## **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.
0%5%$2K10%$5K15%$7K20%$9K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 22 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**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**$6.03**4.7★294 rev](https://www.amazon.com/dp/B0CLXQ3Z8W) [2**Podavelle 1/8 NPT Male Thread Allen Head Socket Pipe Plug Fitting Aluminum Black Pack of 2**Podavelle**$9.86**4.7★364 rev](https://www.amazon.com/dp/B09L4ZFCX1) [3**EVIL ENERGY 1/8 NPT Plugs Aluminum Socket Allen Head Black Pack of 2**EVIL ENERGY**$9.68**4.5★159 rev](https://www.amazon.com/dp/B0B38YD8S4) [4**Legines Solid Brass Pipe Fitting 1/8 NPT Male Square Head Plug (5 pcs)**Legines**$5.99**4.6★241 rev](https://www.amazon.com/dp/B074JZBNQ1) [5**Bonsicoky 5 PCS 1/8 NPT Male Thread Pipe Fitting with Tape - 304 Stainless Steel Internal Hex Pipe Fitting for Sealing Pipe Port**Bonsicoky**$4.86**4.4★13 rev](https://www.amazon.com/dp/B0DB5XMGJS)
**~~View all top sellers →~~**
### **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**$4.07**5 rev6mo ago](https://www.amazon.com/dp/B0GCYVP8JQ) [**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**$3.97**3 rev8mo ago](https://www.amazon.com/dp/B0G1R888NC) [**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**$6.27**2 rev8mo ago](https://www.amazon.com/dp/B0FYP4RGFW) [**2 Pack Brass Pipe Plug 1/8 NPT Male Outer Hex Head Socket Plug Fitting for Plumbing by CX WONDERLAND**CX WONDERLAND**$4.99**36 rev8mo ago](https://www.amazon.com/dp/B0FX51BY1Z) [**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**$5.93**7 rev11mo ago](https://www.amazon.com/dp/B0FM7KKZFG)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**10 Pcs 1/8 NPT Male Pipe Plug Set Brass Hex Counter Sunk Plugs for Closing the End of Pipe**Posocco**$4.07**5.0★**▲ 200%**](https://www.amazon.com/dp/B0GCYVP8JQ) [**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**$5.93**5.0★**▲ 159%**](https://www.amazon.com/dp/B0FM7KKZFG) [**2 Pack Brass Pipe Plug 1/8 NPT Male Outer Hex Head Socket Plug Fitting for Plumbing by CX WONDERLAND**CX WONDERLAND**$4.99**4.7★**▲ 127%**](https://www.amazon.com/dp/B0FX51BY1Z) [**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**$3.97**5.0★**▲ 108%**](https://www.amazon.com/dp/B0G1R888NC) [**2pcs 1/8 NPT Male Brass Pipe Plug Counter Sunk Internal Hex Head by CX WONDERLAND**CX WONDERLAND**$3.99**4.7★**▲ 83%**](https://www.amazon.com/dp/B0FCMJKQ4P)
**~~View all trending →~~**
## **What buyers say about 1/8 npt plug**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**31%
*“Good Fit”*
**Quality-Overall**25%
*“Product quality was as advertised”*
**Efficiency**11%
*“Worked great”*
**Value For Money**11%
*“Excellent deal and Price”*
**Advertised Vs Actual Product**8%
*“Worked as described”*
**Durability**6%
*“So far they are holding very well”*
**Pressure**6%
*“Works perfectly for the gauge port on Aeromotive fuel pressure regulators”*
**Rusts/Corrodes**3%
*“Also they will never rust”*
### **What buyers complain about **
**Metal Quality**33%
*“Just remember to use the appropriate tools because these are soft metal”*
**Strength**33%
*“Delicate”*
**Durability**33%
*“About as expected however I cracked the first one at the hex drive”*
### **Top return reasons **
**Size-Overall**69%
**Advertised Vs Actual Product**8%
**Defective Material/Parts**7%
**Compatibility-Overall**4%
**Value For Money**4%
**Functionality-Overall**3%
**Material Quality**2%
**Width**1%
**Mounting**1%
**Socket/Port/Plug**1%
## **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.
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