Longze Four-Pronged Tee Nuts | DIN 1624 / ASME B18.6.9 | Zinc Plated T-Nuts for Wood | Four-Jaw Furniture Nuts
lisa@lzfasteners.com
Product Title
Longze Four-Pronged Tee Nuts | DIN 1624 / ASME B18.6.9 | Zinc Plated T-Nuts for Wood | Four-Jaw Furniture Nuts
Product Summary
Longze Four-Pronged Tee Nuts (also known as T-Nuts or Four-Jaw Furniture Nuts) are specialized internal-thread fasteners manufactured to DIN 1624 standards, widely used in knock-down furniture, cabinetry,
rock climbing walls, and speaker cabinet assembly. Featuring a flat flange with four sharp prongs (jaws), these Longze Four-Pronged Tee Nuts are driven into a pre-drilled hole in wood or composite materials,
where the prongs "bite" into the surface to prevent the nut from turning during bolt installation.
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✔ Anti-Rotation Security: The four-jaw design provides exceptional mechanical grip, ensuring the nut remains stationary even when high-torque bolts are tightened into it.
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✔ Flush Internal Threading: Provides a clean, threaded metal socket in soft or hard woods where standard screws might strip or fail to hold.
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✔ High-Speed Assembly: Ideal for automated furniture production lines and DIY flat-pack assembly, offering a permanent and reusable threading solution.
Key Features of Four-Pronged Tee Nuts
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Robust Flange Base – Distributes the clamping load over a wide area, preventing the nut from pulling through the timber under heavy tension.
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Self-Locking Jaws – The four sharpened prongs are angled to lock deeper into the wood grain as the mating bolt is tightened.
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Precision Metric & Imperial Threads – Available in Metric (DIN 1624) E Imperial (ASME) sizes to match international furniture hardware standards.
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Resistenza alla corrosione – Finished with high-quality Blue/White Zinc Plating to prevent rusting in indoor and semi-protected environments.
Technical Specifications
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Standards: DIN 1624 / ASME B18.6.9 / Custom Industrial Specs
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Metric Size Range: M3 to M12
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Inch Size Range: #6-32 to 1/2"-13 (UNC / UNF)
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Material: Low Carbon Steel (Q195 / Q235), Stainless Steel (SS304)
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Hardness: Standard soft steel for easy prong penetration
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Finish: Zinc Plated (Clear/Blue/Yellow), Black Oxide, Plain
Material & Mechanical Properties
- Quality of the steel and durability.
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Materiale Grado Feature Applicazione Carbon Steel Q235 / Q195 High Ductility Standard Furniture / Plywood Alloy Steel Grade 8 High Strength Heavy-Duty Equipment Mounts Acciaio inossidabile SS304 (A2) Rust Proof Outdoor Furniture / Marine
Dimensions & Global Size Conversion
- Technical Standard: Longze provides high-precision T-Nuts manufactured to DIN 1624 and ASME B18.6.9 standards. These "blind" fasteners feature a long, internally threaded barrel with a flat flange and four sharp prongs (claws) designed to bite into wood, providing a strong, flush-mounted steel thread for furniture assembly and rock-climbing wall construction.
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American Size (# Gauge/Inch) Nearest Metric Size (M) Barrel Outer Dia. (mm/inch) Flange Diameter (dk) (mm/inch) Barrel Height (L) (mm/inch) #6 - 32 M3.5 5.0 mm / 0.197" 15.0 mm / 0.591" 7.0 mm / 0.276" #8 - 32 M4 5.5 mm / 0.217" 15.0 mm / 0.591" 8.0 mm / 0.315" #10 - 24 M5 6.5 mm / 0.256" 17.0 mm / 0.669" 8.5 mm / 0.335" 1/4" - 20 M6 7.5 mm / 0.295" 19.0 mm / 0.748" 9.0 mm / 0.354" 5/16" - 18 M8 9.5 mm / 0.374" 22.0 mm / 0.866" 11.0 mm / 0.433" 3/8" - 16 M10 12.0 mm / 0.472" 25.0 mm / 0.984" 12.0 mm / 0.472" 1/2" - 13 M12 14.5 mm / 0.571" 27.0 mm / 1.063" 15.0 mm / 0.591"
Installation & Pre-Drilling Guide
- Helping the end-user avoid wood splitting.
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Thread Size Recommended Drill Hole (∅) Min. Hole Depth Min. Board Thickness M5 6.5 mm - 7.0 mm 9.0 mm 10 mm M6 7.5 mm - 8.0 mm 10.0 mm 12 mm M8 9.5 mm - 10.0 mm 12.0 mm 15 mm M10 11.5 mm - 12.0 mm 13.0 mm 18 mm
Applicazioni di Four-Pronged Tee Nuts
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Furniture Manufacturing: Creating strong connection points for table legs, sofa feet, and bed frames.
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Climbing Gyms: The industry standard for securing climbing holds to plywood panels on bouldering walls.
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Audio Equipment: Mounting subwoofers and drivers into heavy MDF speaker enclosures.
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Automotive/RV: Fastening interior cabinetry and panels to wooden sub-floors in campers and vans.
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Industrial Pallets: Securing heavy machinery to wooden shipping bases.
Installation & Usage Guidelines
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Pre-Drilling: Drill a hole slightly larger than the outside diameter of the T-nut barrel. If the hole is too small, the wood may split; if too large, the barrel won't sit snugly.
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Seating the Nut: Use a hammer to tap the T-nut until the prongs are fully seated and the flange is flush with the wood surface. For large batches, use a pneumatic T-nut insertion machine.
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Bolt Length: Ensure the bolt is long enough to engage the full depth of the T-nut threads but not so long that it bottoms out against the material behind the nut.
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Avoid Over-Tightening: In soft woods like pine, over-tightening can cause the prongs to strip the wood fibers, leading to the nut spinning freely.
Quality Control & Logistics
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ISO 9001 Certified production with rigorous checks on thread pitch and prong alignment.
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Hardness Testing: Ensuring the prongs are ductile enough to bend into the wood without snapping, yet strong enough to resist rotation.
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Salt Spray Testing: Verification of zinc plating thickness for long-term storage and use.
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Packaging:
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Bulk 25kg Export Cartons
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Fumigation-Free Pallets
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Custom small-box retail packaging (100, 500, 1000 pcs) available
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Q: Can I use T-Nuts in hardwood like Oak or Maple? A: Yes, but you must be careful. Hardwoods are prone to splitting. We recommend a slightly larger pilot hole and using a C-clamp to press the T-nut into the wood rather than a hammer.
Q: What happens if the T-nut starts spinning? A: This usually means the wood fibers have stripped. You may need to move the hole slightly or use an epoxy adhesive to reset the nut in place.
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