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FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Friday, Nov 13
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At a glance
- Condition
- New
- Size
- 1/4-20 x 15mm*40pcs
- Model
- 1/4-20WOODINSERT
- Weight
- 0.2 kg
- Color
- White
- Material
- Carbon Steel
- Fastener Type
- Insert
Features 5
- 1/4-20 threaded insert x 15mm length, 6mm allen wrench included, best 1/4"-20 threaded insert wood insert furniture screw in nut connector screws.
- Insert head : 0.461" / 11.7mm, body : 0.315" / 8mm, threads : 0.410" / 10.4mm.
- Threaded inserts are easy to install, simply drill the right size hole and Install with hex key provided.
- In Softer wood, the outside threads cut easily into the wood, simply drill a Appropriately Sized Hole (8.5mm, 9mm, 9.5mm, 3/8" drill bit) for the body of the insert, then screw insert into the place.
- In very Harder wood such as white oak or maple, drill a hole size (3/8", 9.5mm, 10mm drill bit) that close to the outside threads diameter, then screw insert into the place. If the drilled hole is too small for the threads, screwing it in MAY split the wood or insert.
Description
Screw in threaded inserts are best for softer woods plywood and hardwood, their outer threads cut easily into your wood applications, you just need to drill a hole that the size of the body into the wood for the threaded insert.
Specs 27
| Material | Carbon Steel |
|---|---|
| Fastener Type | Insert |
| Thread Size | 1/4"-20 |
| Exterior Finish | Zinc |
| Color | White |
| Thread Type | Unified National Coarse (Unc) |
| Inside Thread Size | 0.410 INCH / 10.4MM |
| Thread Style | Right Hand |
| Thread Class | Class 2A |
| Screw Head Style | Hex |
| Compatible Groove Diameter | 10.4 millimeters |
| Drive Style | External Hex |
| Grade Rating | industrial |
| Item Weight | 0.2 kg |
| Size Name | 1/4-20 x 15mm*40pcs |
| Item Diameter | 0.25 inches |
| Number of Pieces | 40 |
| Outside Diameter | 11.7 millimeters |
| Brand | Sprite Science |
| Set Name | 40 pieces |
| Manufacturer | Sprite Science |
| Model | 1/4-20WOODINSERT |
| Number Of Items | 40 |
| Part Number | 1/4-20WOODINSERT |
| Material Type | Carbon Steel |
| Metal Type | Carbon Steel |
| Finish Types | Zinc plated carbon steel |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Nov 13
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Very handy and easy to install
Size: 1/4-20 x 15mm*40pcs
Great little inserts, perfect for assembling panels that you may want to disassemble some day. Used in plywood without any issues. They seem to be die cast metal, but hold well. I wouldn't use them for high torque applications, but for most light to medium duty applications they should work great.
Reviewed in the United States on January 27, 2026 by tgtech
How buying hardware should be
Size: 1/4-20 x 15mm*40pcs
I used these when building a crib. They go in easy and look great. I was impressed by the quality and the attention to detail the sellers had. The bag had all the size information and drilling requirements. I used 24 of them and they each performed well. They even included an allen wrench. I have plenty of them, but it is nice to keep everything in the same spot. Now when I store them and use them later, the directions and the allen wrench will be in the same bag. Great job, this is how buying hardware should be.
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Reviewed in the United States on May 8, 2025 by MLBrub
They Worked Equal to or Better than Expected
Size: 1/4-20 x 15mm*40pcs
Great product. Worked as they should. As a note, as I was setting these units in aged, very hard, dense hickory I was concerned about stripping the hex head. Especially as I was concerned about the treads pulling out of the wood so I drilled the pilot hole for soft wood. To help reduce friction, I applied some bar soap to the external threads prior to threading them into the wood. The inserts went in easily and I had no issues with stripping the hex heads.
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Reviewed in the United States on February 20, 2024 by Fallswine
Good price, quality inserts.
Size: 1/4-20 x 20mm*40pcs
Used these when making a kid’s bed. These inserts work fantastic. Had no problem with them; just make sure you drill the correct size pilot hole.
Reviewed in the United States on May 10, 2024 by JAmidon
Works well
Size: 1/4-20 x 10/15/20mm*60pcs
Arrived promptly and well packaged. Works well for wood working and furniture making
Reviewed in the United States on April 10, 2026 by LisaK
Like them a lot
Size: 1/4-20 x 20mm*40pcs
Well made, will take the load. Been using inserts for over 50 years, the info about testing hole sizes would have been helpful back in the day. A 6mm hex point on a low torque impact driver is the most efficient way to install. Will look for this brand again when I need more.
Reviewed in the United States on January 24, 2026 by Emerson
Very good quality
Size: 1/4-20 x 10/15/20mm*60pcs
These are excellent inserts, sharp deep defined threads screw and hold into wood very well, nicely machined. Use with a 3/8" pilot hole. Comes with a nice plastic container, allen key; and instruction card.
Reviewed in the United States on December 20, 2025 by Redbadboy
Easy to install; great directions
Size: 5/16-18 x 15mm*40pcs
I wanted to install these to attach some locking swivel casters on the base for my router table. The directions provided were very helpful. I ended up assembling an installation and removal tool. The coupling nut opposite the threaded insert is installed loosely in the drill press chuck. By "loosely" I mean that the chuck jaws hold the nut in alignment but the nut is loose enough to slip. The insert is installed by tightening the nut next to the insert. If the hole for the insert is the correct size (tight, but not TOO tight). the installation tool can be remove by loosening the nut closest to the insert. If the hole isn't snug enough, the tool can be removed by holding the shaft and using a wrench to remove the lower nut. These inserts worked great. They were just what I needed to get a great looking caster installation.
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Reviewed in the United States on February 24, 2023 by F. Kerby