Material
Carbon Steel
Type
Four-claw press-in nut
Size Range
M4–M12
Surface Finish
Zinc-Plated / Plain
Grade
Steel / A2 / A4
Standard
4-prong press-in
Packaging
Carton / Pallet
MOQ
1 piece (sample)
Precision Manufacturing, Batch After Batch
From cold-heading raw steel wire to heat-treated finished bolts, every step runs under strict in-house process control — ensuring the dimensional accuracy and strength grade printed on every head marking.
Product Overview
Application Scenarios
A jaw nut, or four-prong T-nut, is a threaded barrel with a flange carrying four sharp claws that are hammered or pressed into wood, plywood or composite panels to leave a strong, flush machine thread. As a bolt is tightened the prongs bite deeper and stop the nut spinning, giving a re-usable metal thread in material that could not otherwise be tapped. They are the standard fixing for knock-down and flat-pack furniture, cabinets, speaker boxes, climbing walls, jigs, exhibition stands and plywood fixtures. Zinc-plated steel suits general use; stainless versions suit damp and outdoor timber.
Installation Notes
Drill the barrel clearance hole through the panel and press or tap the T-nut in from the back until the flange sits flush and all four prongs are fully buried — a smear of glue in the hole adds pull-out strength in softwood. For a fully flush back, counterbore the flange. Fit from the face that will not be seen, and where the bolt may be removed often, use the four-prong (jaw) type rather than three-prong for the best grip. Do not over-torque in thin or soft panels or the prongs can pull through; add a washer under the bolt head on the face side.
Material & Certification
Formed from carbon steel with a threaded barrel and four press-in prongs and zinc-plated, with thread and prongs checked and every batch traceable to raw material certificates. Each lot passes dimensional inspection before packaging; EN 10204 3.1 material certificates are available on request.
Jaw Nut (4-Prong T-Nut)
Zinc-Plated Jaw Nut · 4-Prong T-Nut
Dimensional Specifications
Typical Reference Dimensions — click a size to locate it below
| Thread Size | Flange Dia F (mm) | Barrel B (mm) | Prong (mm) |
|---|---|---|---|
| M4 | 15 | 8 | 6 |
| M5 | 17 | 9 | 6 |
| M6 | 20 | 11 | 7 |
| M8 | 22 | 13 | 8 |
| M10 | 25 | 15 | 9 |
| M12 | 28 | 16 | 10 |
Typical reference dimensions — this part is not covered by a fixed DIN/ISO dimensional standard and is made to your drawing. Contact us with your panel thickness, grip, length or head requirement for an exact specification sheet.
Applications
Construction
Steel structures, bridges, buildings, concrete anchors
Machinery
Heavy equipment, industrial machines, manufacturing
Infrastructure
Railways, towers, pipelines, power transmission
Automotive
Vehicle assembly, chassis, engine components
Trusted By Global Buyers
Factory-direct T-nuts exported to construction, machinery and infrastructure buyers across Europe, Africa, Asia and the Americas.