# HELIFOUNER 1/4"-20 x 20mm Blue Zinc-Plated Wood Threaded Inserts, 40-Piece

Blue Zinc-Plated: HELIFOUNER wood threaded inserts provide 1/4"-20 internal threads in a 20mm-long carbon-steel insert. This 40-piece set is presented for furniture repairs and woodworking in soft wood, plywood, fiberboard, and other listed materials, with hex-socket installation.

- [Original product page](https://best-deals.pro/product/helifouner-wood-threaded-inserts-1-4-20-20mm)
- [View offer](https://best-deals.pro/visit/helifouner-wood-threaded-inserts-1-4-20-20mm)
- Market: US
- Language: en-US
- Currency: USD
- Brand: HELIFOUNER
- Model: HELIFOUNER-Nut-Inserts
- Category: Tools & Garden > Hardware & Building Materials
- Price: 4.99 USD
- Previous price: 9.99 USD
- Discount: 50%
- Price checked: 2026-11-12T11:11:52.850Z
- Rating: 4.4 / 5
- Reviews: 139

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Hex-socket drive is specified for turning the insert into a prepared wood hole.
- The listing describes use in furniture repairs and names soft wood, plywood, and fiberboard among the intended materials.
- The product is specified for standard 1/4-20 screws and bolts.

## Pros

- The 1/4"-20 thread size suits projects using matching standard screws or bolts.
- A 40-piece quantity supports multiple repairs or installations.
- The listing gives a specific installation approach using a 3/8" drill bit and hex wrench.

## Specifications

### Identity
- Brand: HELIFOUNER
- Model: HELIFOUNER-Nut-Inserts
- Fastener type: Insert
- Number of pieces: 40
### Size and threads
- Size: 1/4"-20 x 20mm
- Thread size: 1/4"-20
- Thread type: Unified National Coarse
- Inside thread size: \#4
- Thread style: Right Hand
- Thread coverage: Fully Threaded
- Thread class: Coarse
- Item diameter: 0.25 inches
- Compatible groove diameter: 9.5 millimeters
### Materials and finish
- Material listed: Carbon Steel
- Exterior finish: Zinc
- Color: Blue
### Installation and form
- Drive style: Internal Hex
- Screw head style: Hexagonal with Flat Top
- Grade rating: industrial

## Before you buy

- The listing advises a precise 90-degree installation and says to countersink the hole to the head size. It suggests enlarging the hole in high-hardness wood. Keep the small parts away from children.
- The listing's description states that one 6mm hex wrench is included, but the separate package details do not confirm the full contents. It also gives a 3/8" drill-bit installation instruction and separately recommends a 9.5 +/- 0.2 mm hole, while the listed compatible groove diameter is 9.5 millimeters. The inside thread size is also shown as \#4 despite the stated 1/4"-20 thread. Check the dimensions and wrench inclusion for your application before ordering.

## A good fit for

- Wood furniture repairs involving matching 1/4"-20 screws or bolts.
- DIY and woodworking projects using soft wood, plywood, or fiberboard.
- Buyers needing a multi-piece supply of blue zinc-plated inserts with internal hex drive.

## Less suited to

- Projects requiring a different internal thread size or insert length.
- Buyers who need package contents or installation dimensions confirmed without checking the selected listing.

## Customer feedback

Customer feedback describes the inserts as good quality, as described, functional, and worthwhile for the money. For projects that match the listed 1/4"-20 size and wood applications, those reports are relevant, though experiences are not uniformly positive and do not resolve the listing's dimensional and package uncertainties.
- Positive themes: Customers describe the inserts as good quality and working as intended.
- Positive themes: The supplied feedback characterizes them as good value for money.

## Frequently asked questions

### What screws fit these inserts?
The listing specifies 1/4"-20 threads and says they fit standard 1/4-20 screws and bolts.
### What hole size does the listing recommend?
It gives a 3/8" drill-bit instruction and separately recommends a 9.5 +/- 0.2 mm hole. It also lists a compatible groove diameter of 9.5 millimeters, so confirm the right preparation for your material and installation.
### Is a hex wrench included?
The detailed description lists one 6mm hex wrench, but the separate package details do not confirm it. Check the selected listing if the wrench is essential.
### What materials are these intended for?
The listing names soft woods, plywood, and fiberboard, and also refers to composite materials and hardwood. It recommends enlarging the hole when the wood material is high-hardness.

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## Add-ons

- [MewuDecor 1/4-20 x 3/4" Flat Head Socket Head Screw Furniture Bolts Countersunk Connector Screws, Stainless Steel 18-8 \(304\), Black Oxide, Fully Threaded, 25 PCS](https://best-deals.pro/visit/helifouner-wood-threaded-inserts-1-4-20-20mm)
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## Images

![HELIFOUNER 1/4"-20 x 20mm Blue Zinc-Plated Wood Threaded Inserts, 40-Piece — 1](https://best-deals.pro/i/99biyjecBdDlgbfkp_1bXcSBR8n59_SoeYPF-aYsYteS1Z7vSykSYmCotdgqOjW3q4TpWVP4OvpCI0OdPOBuWl6mQ50tlpnnlN7cmqNY1cprIKrXgcLn.jpg)

![HELIFOUNER 1/4"-20 x 20mm Blue Zinc-Plated Wood Threaded Inserts, 40-Piece — 2](https://best-deals.pro/i/K4UEA0M3v9OaChwsYX4I0hG0zlvZv5DdKcGWGeTc7sqB4eF282FKSwxBkzQevgbKtHyzqM0jwYemKPKvf3-2dqzqDqvIJNfuu8W6bbENx_PosBx4BBh3.jpg)

![HELIFOUNER 1/4"-20 x 20mm Blue Zinc-Plated Wood Threaded Inserts, 40-Piece — 3](https://best-deals.pro/i/oi4s7FR7YpdHaO5ILBqaKOPy5IrW64nZm_X-RHLI9l_g6Z05XTX0MQjA8W9PkHMqZn_CYmD1T7oszQrUIbJokfKTZ1a3NhEAwjq6URaFgMxeEFq3WNdV.jpg)

![HELIFOUNER 1/4"-20 x 20mm Blue Zinc-Plated Wood Threaded Inserts, 40-Piece — 4](https://best-deals.pro/i/LJo3QXYdm32fd0oU1OU78TVubGJZfHTtKyRJ5-537TcZhjhiOIaa1P8fqrHvBzrwfsFW82ApIQhAB6VWHPOWX-G8F6PoaVVnbDebd3zh25akjGM6SMDu.jpg)

![HELIFOUNER 1/4"-20 x 20mm Blue Zinc-Plated Wood Threaded Inserts, 40-Piece — 5](https://best-deals.pro/i/fOhxIzL43W9E3WYjv0xljVI0BdISWhZStdaOdz-Ibk5EkcE4zdRt_EQaUQxErpx5WUDiUfmppkQ8xnV628sHHlL_gQzOb2a7ifCoJX12MM8MIxsxYwIw.jpg)

![HELIFOUNER 1/4"-20 x 20mm Blue Zinc-Plated Wood Threaded Inserts, 40-Piece — 6](https://best-deals.pro/i/iOVR_82fMiPnfvCRzzOd4_EjSWc49nn4kMGuunmuTGSejThOA3ASAooJrkymVVLsMBEs41vctvMl1LMq97wjQ4o2gPrnT-XiowLjevZOBm_2Zef1bg4m.jpg)