51Pcs M6 Beds Cot Flat Socket Furniture Bolts Screw, Barrel Nuts & Allen Key Kit
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M6 Furniture Bolts & Barrel Nuts Kit 51-Piece — Flat Socket Hex Drive Screws for Bed Frames, Cribs & Flat-Pack Furniture
A single missing or stripped bolt can make an entire bed frame unusable — and tracking down the exact replacement hardware from the original manufacturer is rarely straightforward. Whether you're assembling a new crib, replacing worn-out fasteners on a bunk bed, or building flat-pack furniture from scratch, having the right M6 barrel nut hardware on hand saves time and frustration. This kit is built for homeowners, parents, and DIYers who need a reliable, complete set of furniture fasteners without hunting through multiple hardware stores.
The 51-piece kit includes five M6 bolt lengths — 40mm, 50mm, 60mm, 70mm, and 80mm (5 pcs each) — plus 25 M6x12mm barrel nuts and one M4 Allen key, all stored in a compartmentalized plastic organizer box. Bolts feature a round head with hex socket (Allen) drive and are machined from zinc-plated carbon steel with clean, burr-free threads. Barrel nut diameter is 12mm, compatible with standard furniture pre-drilled holes.
Use this set for assembling or repairing cribs, bunk beds, and bed frames that use M6 barrel nut connections, connecting wooden panels in cabinet and wardrobe builds, replacing lost or stripped hardware on flat-pack furniture, and general knock-down furniture joinery where a hidden, re-tightenable connection is needed.
✅ Key Features of These M6 Furniture Bolts and Barrel Nuts
- 51-Piece Complete Kit: Five bolt lengths (M6x40 through M6x80mm, 5 pcs each), 25 M6x12mm barrel nuts, and an M4 Allen key — everything needed for assembly or repair in one organized box.
- Zinc-Plated Carbon Steel: All bolts and barrel nuts are zinc-plated for corrosion resistance and long-term durability in indoor furniture applications — threads stay clean and re-usable.
- Burr-Free Hex Socket Drive: Round head bolts with M4 Allen key drive and machined burr-free threads engage smoothly with barrel nuts, reducing cross-threading risk during assembly.
- Five Length Options in One Set: 40mm to 80mm coverage handles the most common panel thicknesses in flat-pack furniture — no need to buy separate sets for different connection depths.
- Direct Replacement Hardware: Standard M6 thread and 12mm barrel nut diameter match the factory specifications of most flat-pack cribs, bunk beds, and cabinets — ideal for replacing lost or stripped original hardware.
- Compartmentalized Storage Box: Transparent organizer with separate sections for each bolt length and the barrel nuts keeps all 51 pieces sorted and easy to find during assembly.
📐 Technical Specifications — M6 Furniture Bolt & Barrel Nut Set
| Total Pieces | 51 |
|---|---|
| Bolt Thread Size | M6 |
| Bolt Lengths | 40mm, 50mm, 60mm, 70mm, 80mm (5 pcs each) |
| Head Style | Round head, hex socket (Allen) drive |
| Drive Size | M4 hex (Allen key included) |
| Barrel Nut Size | M6 x 12mm (25 pcs) |
| Material | Zinc-plated carbon steel |
| Thread Condition | Burr-free, clean engagement |
| Compatible Furniture | Cribs, bunk beds, bed frames, cabinets, wardrobes, flat-pack furniture |
| Storage | Compartmentalized transparent plastic organizer box |
| Set Weight | Approx. 0.44 kg (0.97 lbs) |
❓ Frequently Asked Questions
What bolt lengths are included in this M6 furniture bolt kit?
The kit includes 5 bolt lengths: M6x40mm, M6x50mm, M6x60mm, M6x70mm, and M6x80mm, with 5 pieces of each length, plus 25 M6x12mm barrel nuts and 1 M4 hex key — 51 pieces total.
What furniture types are these bolts compatible with?
These M6 furniture bolts and barrel nuts are designed for flat-pack and knock-down furniture including cribs, bunk beds, bed frames, cabinets, wardrobes, bedside tables, and shelving units that use M6 barrel nut connections with a 12mm barrel nut hole.
How do barrel nuts work with these bolts?
Barrel nuts (also called cross dowels) are cylindrical nuts that sit in a pre-drilled hole in the wood panel. The bolt passes through the connecting piece and threads into the barrel nut, creating a strong, hidden joint that can be tightened with an Allen key from the outside — and re-tightened if the joint loosens over time.
Can these replace lost or stripped bolts on an existing bed frame?
Yes. These are standard M6 furniture bolts and barrel nuts, making them suitable replacements for lost, stripped, or damaged hardware on most flat-pack bed frames, cribs, and cabinets that use M6 barrel nut connections. Verify the barrel nut hole diameter (12mm) matches your furniture before ordering.
What Allen key size is needed for these bolts?
The bolts use an M4 hex socket drive. An M4 Allen key is included in the kit, so no additional tools are required for installation.
What material are these furniture bolts made from?
All bolts and barrel nuts are made from zinc-plated carbon steel, which provides corrosion resistance and durability for long-term indoor furniture use. The zinc plating also helps threads stay clean and re-usable over multiple assembly and disassembly cycles.
Which bolt length should I choose for my furniture?
Bolt length depends on the combined thickness of the panels being joined. Generally, the bolt should pass fully through the connecting panel and engage at least 10–15mm into the barrel nut. Measure your panel thickness and add the barrel nut engagement depth to determine the correct length. The 5-length range (40–80mm) covers most standard flat-pack furniture configurations.