Is 3/8 hose clamp profitable to sell on Amazon United States?

The niche generates $88K/yr across 20 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is +25.3%. Flapen's verdict: Worth a look (53/100).

How competitive is the 3/8 hose clamp niche?

16 brands and 19 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 64% of demand.

What do buyers complain about in 3/8 hose clamp?

Top complaints mined from reviews: Quality-Overall, Size-Overall, Leak-Proof. The return rate is 2.0%.

When does demand for 3/8 hose clamp peak?

Demand peaks in May; the busiest month runs 2.0× the quietest.

What does it cost to enter the 3/8 hose clamp niche?

Listings span $4.88–$16.61; the average listing price is $8.75 (sweet spot $15–$100). The average incumbent carries 1,357 reviews — the moat a new listing must climb.

3/8 hose clamp

Worth a look

Shows searches that convert (13.6% search→purchase), but prices mostly outside the sweet spot ($4.88–$16.61) keeps it on the watch list.

Conversion

Incredible13.6%

search→purchase rate — share of searches ending in a sale

Returns

Great2.0%

return rate — above 5% kills the launch gate

Brand share

Good64%

top-5 brand share — brands hold most of the demand

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Review moat

Good1,356.85

avg incumbent reviews — the moat a new listing must climb

Growth

Good+25.3%

90-day search growth — must beat 0% to launch

Competition

Okay58%

top-5 click share — leaders hold, buyers still browse

Avg price

Bad$8.75

avg listing price — sweet spot $15–$100

Market size

Bad$88K

$88K/yr · 74K searches

Price range

Bad$4.88–$16.61

cheapest to priciest tracked listing — scored on the share inside $15–$100

According to Flapen's Amazon United States niche tracking, 3/8 hose clamp is a $88K/yr Amazon United States market (74K searches/yr). The top 5 brands hold 64% of demand. Demand peaks in May. Verdict: Worth a look — 53/100.

Data updated Jul 9, 2026 · scored weekly · How we score niches

3/8 hose clamp market data

Units sold / yr: 10K–13K; avg 500–750/product
Revenue / yr: $88K–$109K; units × avg price
Conversion rate: 13.6%
Avg BSR: #52
Page quality: 0%
Prime: 100%
Sponsored: 80%
Out of stock: 0.0%
Avg brand age: 43 months
Avg seller age: 186 days

Competition & brand share

The top 5 products take 58% of clicks — established leaders, but buyers still shop beyond them.

Brands

16 falling

Sellers

Top-5 brand share

64%

Top 20: 100%

Top-5 click share

58%

Top 20: 100%

Open market

29%

LOKMAN21%
Tnisesm14%
Steelsoft11%
Rierdge9%
OURU8%
Coufce7%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +25.3% search growth over the last 90 days.

Peak months: May · busiest ÷ quietest = 2.0×

Open Trend

Top 3/8 hose clamp search terms

3/8 hose clamp36K/yr +21.6%12.2% conv.
3/8 fuel line clamp12K/yr +32.2%9.8% conv.
3/8 hose clamps10K/yr +30.0%12.7% conv.
hose clamps 3/84K/yr +29.4%12.6% conv.
3/8 clamp4K/yr -4.9%7.1% conv.
3/8 fuel line hose clamps3K/yr +61.6%10.6% conv.
3/8 fuel line clamps4K/yr +11.4%13.3% conv.
3/8 hose clamps stainless steel3K/yr +60.0%12.7% conv.

All search terms

Top 3/8 hose clamp 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 20 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

LOKMAN 20 Pack Stainless Steel Hose Clamp Adjustable 3/8 - 5/8 (10-16mm) Worm Gear Hose Clamp Metal Fuel Line Pipe Clamp for Plumbing Automotive And Mechanical Application

LOKMAN$7.884.4★11,495 rev

Non-Slip Stainless Steel Worm Gear Hose Clamps 3/8 to 5/8(10-16mm)

Steelsoft$8.264.5★1,757 rev

Tnisesm 12Pcs Replacemnt for 3/8 Fuel Injection Gas Line Hose Clamps Clip Pipe Clamp Assortment Kit Hoses Clamps Sleeving 9/16 - 5/8 Dia

Tnisesm$8.204.6★706 rev

Rierdge 20 Pcs 3/8 Inch ID Spring Band Type Clamps 10mm Fuel Hose Clamps Fasteners Black Spring Hose Clip for Fuel Hose Line Water Pipe Air Tube Hose

Rierdge$7.974.3★593 rev

Coufce 20 pcs 3/8 - 5/8 304 Stainless Steel Hose Clamps Adjustable Metal Pipe Clamp Worm Gear for Pipe - Dryer Repair Tubing and Fuel Line

Coufce$5.013.8★51 rev

Newest

by launch date

Hose Clamp Stainless Steel Hose Clamps for 3/8 Inch to 5/8 Inch Hose Pipe Adjustable Worm Gear Hose Clamps for Fuel Line Radiator Plumbing Automotive Mechanical 10 Pack

Gudui$5.971,231 rev

6mo ago

LIDUOLE 3/8-5/8 Inch Hose Clamp Stainless Steel Worm Gear Adjustable Hose Clamps 10-16MM Metal Hoseclamp for Radiator Automotive Pipe Fuel Line (Pack of 20Pcs)

LIDUOLE$7.9545 rev

6mo ago

30PCS 304 Stainless Steel Hose Clamp Assortment Kit 3/8 - 5/8 (10-16mm) Adjustable Worm Gear Fuel Line Clamp for Plumbing Automotive And Mechanical Applications

imsiboc$7.38153 rev

11mo ago

3/8 Fuel Line Clamp Stainless Steel 20PCS Adjustable Tube Hose Clip Tube Clamps Mini Fuel Injection Gas Line Hose Clamps for Automotive (9/16-5/8 Dia)

Vin Beauty$9.7126 rev

1y ago

zDwfDc 34PCS 8-18mm 5 Sizes Fuel Injection Line Hose Clamps Assortment Kit 1/4 5/16 3/8 Fuel Line Hose Clamp for Automotive Diesel Petrol Pipe DD025

zDwfDc$7.57186 rev

1y ago

What buyers say about 3/8 hose clamp

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall31%

“well made”

Value For Money20%

“Excellent value”

Advertised Vs Actual Product14%

“As advertised”

Size-Overall5%

“Came in one day, fit perfectly”

Ease Of Use3%

“They are also incredibly convenient to use”

Functionality-Overall2%

“They work”

Correct Contents2%

“nice assortment”

Efficiency2%

“worked well”

Pressure2%

“they are exactly what is needed when replacing high pressure fuel hoses”

Material Quality2%

“All good materials”

What buyers complain about

Quality-Overall30%

“Do not buy these are way to cheaply made”

Size-Overall22%

“Small engine clamps”

Leak-Proof8%

“i doubt this will leak with the 1100+ psi rating”

Functionality-Overall8%

“will blow off”

Grip5%

“problem is the nut driver slips”

Value For Money4%

“Not worth the money”

Strength3%

“These are very weak clamps”

Pressure3%

“anything that would not be high pressure they would probably be ok”

Assembly/Installation3%

“Any effort tightening them strips them out”

Durability2%

“Half of them break when applying any amount of torque”

Top return reasons

Size-Overall80%

Advertised Vs Actual Product4%

Compatibility-Overall3%

Quality-Overall3%

Functionality-Overall2%

Defective Material/Parts2%

Value For Money1%

Material Quality1%

Mechanism Issues1%

Mounting0%

Common questions

Is 3/8 hose clamp profitable to sell on Amazon United States?: The niche generates $88K/yr across 20 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is +25.3%. Flapen's verdict: Worth a look (53/100).
How competitive is the 3/8 hose clamp niche?: 16 brands and 19 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 64% of demand.
What do buyers complain about in 3/8 hose clamp?: Top complaints mined from reviews: Quality-Overall, Size-Overall, Leak-Proof. The return rate is 2.0%.
When does demand for 3/8 hose clamp peak?: Demand peaks in May; the busiest month runs 2.0× the quietest.
What does it cost to enter the 3/8 hose clamp niche?: Listings span $4.88–$16.61; the average listing price is $8.75 (sweet spot $15–$100). The average incumbent carries 1,357 reviews — the moat a new listing must climb.