oil filter adapter 1/2-28
Skip itSoft demand (-54.3% this quarter) — this niche doesn't clear our bar today.
Conversion
Incredible15.4%search→purchase rate — share of searches ending in a sale
Review moat
Incredible88.92avg incumbent reviews — the moat a new listing must climb
Returns
Great1.0%return rate — above 6% kills the launch gate
Avg price
Good$12.51avg listing price — sweet spot $15–$100
Price range
Okay$8.73–$20.00cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Brand share
Okay82%top-5 brand share — brands hold most of the demand
Competition
Bad77%top-5 click share — a locked-up shelf
Market size
Bad$47K$47K/yr · 24K searches
Growth
Bad-54.3%90-day search growth — must beat 0% to launch
Competition
The top 5 products capture 77% of clicks — a locked-up shelf that new listings rarely crack.Brands
11 rising
Sellers
12
Top-5 brand share
82%
Open market
14%
- Gugaguga50%
- Jingzan12%
- Axyuada9%
- Tllsdss6%
- IHOTDER5%
- HHLZDHH4%
- Open — no brand owns it (5 brands, 14%)
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 12 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
2 Pack Thread Adapters and Washers 1/2x28-3/4x16 Black
Gugaguga$11.374.6★592 rev
Gugaguga 2 Pcs Thread Adapters and Washers 1/2x28-3/4x16 Black
Gugaguga$12.934.5★116 rev
4-Pack 304 Stainless Steel 1/2-28 Female to 3/4-16 Male Thread Adapter Heavy-Duty Thread Reducer Converter with Rubber Washers & O-Rings Precision CNC Thread Adapters
Jingzan$16.944.7★5 rev
3 Pack Thread Protector and Washers 1/2 * 28-3/4 * 16 Black
Axyuada$10.434.5★55 rev
6 Pack Steel Thread Protector & Washers 1/2x28 to 3/4x16 Black Set Kit
Tllsdss$20.004.4★27 rev
Newest
by launch date
Senlinyu Thread Adapter and Rubber Washer 1/2-28 to 3/4-16 Thread Protector Fittings for Fuel Cooling Brake System Automotive Accessories for Car Truck SUV (2PCS -1/2-28 to 3/4-16 Thread Protector)
Senlinyu$8.7318 rev
HNYYZL Thread Adapters with Washers 1/2 * 28-3/4 * 16
HNYYZL$14.031 rev
6 Pack Steel Thread Protector & Washers 1/2x28 to 3/4x16 Black Set Kit
Tllsdss$20.0027 rev
4-Pack 304 Stainless Steel 1/2-28 Female to 3/4-16 Male Thread Adapter Heavy-Duty Thread Reducer Converter with Rubber Washers & O-Rings Precision CNC Thread Adapters
Jingzan$16.945 rev
SPEEDWOX 2PCS Oil Filter Adapter Thread Adapter 1/2-28 Female to 3/4-16 13/16-16 3/4 NPT Male Hose Reducer Fuel Line Fitting Connector with O-ring and Tape for Oil Coolers Fuel Tanks and Pumps
SPEEDWOX$8.9113 rev
Trending
90-day click momentumHNYYZL Thread Adapters with Washers 1/2 * 28-3/4 * 16
HNYYZL$14.035.0★
Senlinyu Thread Adapter and Rubber Washer 1/2-28 to 3/4-16 Thread Protector Fittings for Fuel Cooling Brake System Automotive Accessories for Car Truck SUV (2PCS -1/2-28 to 3/4-16 Thread Protector)
Senlinyu$8.734.7★
4-Pack 304 Stainless Steel 1/2-28 Female to 3/4-16 Male Thread Adapter Heavy-Duty Thread Reducer Converter with Rubber Washers & O-Rings Precision CNC Thread Adapters
Jingzan$16.944.7★
6 Pack Steel Thread Protector & Washers 1/2x28 to 3/4x16 Black Set Kit
Tllsdss$20.004.4★
SPEEDWOX 2PCS Oil Filter Adapter Thread Adapter 1/2-28 Female to 3/4-16 13/16-16 3/4 NPT Male Hose Reducer Fuel Line Fitting Connector with O-ring and Tape for Oil Coolers Fuel Tanks and Pumps
SPEEDWOX$8.913.9★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -54.3% search growth over the last 90 days.Peak months: Jan, Feb, Dec · busiest ÷ quietest = 4.2×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“true to size”
“Just as described”
“Good quality adapters for project”
“Great value”
“Adding the filter helps with constant flow”
“Works great”
“Inside and outside threads are clean”
“Strong”
“my children have enjoyed playing with them”
“Such aesthetics are of no concern for my purpose”
What buyers complain about
“Junk”
“Does not fit”
“being thin on the edges”
“Heavy”