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🔧 Upgrade your thread game — fit, finish, and function in one sleek sleeve!
This 5-piece set of thread adapter sleeves converts M10 10mm male threads to M8 8mm female threads with precision-engineered, deep threads for even force distribution. Manufactured with strict quality control and tested for durability, these smooth-finished nuts provide reliable, long-term performance for various mechanical and DIY applications.






| ASIN | B09GFWFJ4G |
| Best Sellers Rank | #514,292 in Electronics ( See Top 100 in Electronics ) #998 in Audio & Video Adapters |
| Brand | SecosAutoparts |
| Colour | Silver |
| Compatible Groove Diameter | 1E+1 Millimeters |
| Customer Reviews | 4.0 out of 5 stars 51 Reviews |
| Fastener Type | Reducing |
| Finish Types | Plain, Brass |
| Head Style | Hex |
| Item Diameter | 10 Millimetres |
| Item Shape | Round |
| Manufacturer | SecosAutoparts |
| Material | Alloy Steel Brass |
| Material Type | Alloy Steel Brass |
| Model | does not apply |
| Number of Pieces | 5 |
| Part Number | does not apply |
| Screw Head Style | Hex |
| Size | M10 10mm Male To M8 8mm Female |
| Size Name | M10 10mm Male To M8 8mm Female |
| Thread Size | M8, M10 |
| UPC | 755769291007 |
A**W
Will crack if you go strong
Worked perfectly for my couch legs. But did split on due to over tightening.
S**B
Weak and fragile. Don't waste your money. Try something else.
These particular thread reducers are horrible quality. I attempted to use one and it fractured under very little torque. I tried another and it broke as well. These are made of the most brittle and weak metal I have ever seen. I definitely cannot recommend this product.
K**G
Well made
Fit perfect
S**.
Worked
Met my need - cat tree house that had 10mm sockets and replacement scratching post with 8mm hardware. Didn’t really need 5 but easier than going out to Home Depot and hoping they had one.
D**S
Easy to use
We ran into a problem with the old bed frame being 3/8” not 10mm and couldn’t find any adapters that were 8mm to 3/8”. So we used these 8mm to 10mm after using a tap to retread it to 10mm. Worked great.
Trustpilot
2 months ago
4 days ago