Reference illustration — produced to your drawing
Nuts
Hex Coil Nuts
A hex coil nut is a long hexagonal coupling nut threaded through its full length to join two threaded rods or bolts end to end. Its extra length gives more thread engagement than a standard hex nut.
Used to extend threaded rod, tie formwork and join hangers in construction and mechanical assembly. Bought by contractors, maintenance buyers and fabricators.
Standard
DIN 6334
Size range
M3 – M48 · 1/8 – 2 in
MOQ
From 50 pcs
Lead time
Samples 5–10 days
What we produce
- Carbon steel 1045, stainless steel 304 or 316L
- Full-length thread in metric coarse, fine, UNC or UNF
- Long hex body joins two rods end to end
- Zinc-plated or hot-dip galvanized finish
- Dimensional tolerances held to ISO 2768-m
Specification notes
- Common lengths run about 1.5 to 6 times the thread diameter
- Available as a plain or chamfered coupling nut
- Minimum order quantity starts from 50 pieces
Specifications
Every line below is a starting point, not a limit. Non-standard sizes, special threads and unusual materials are what we do — send the drawing and we confirm what fits.
| Standard | DIN 6334 |
|---|---|
| Size range | M3 – M48 · 1/8 – 2 in |
| Threads | Metric coarse and fine · UNC · UNF |
| Head / geometry | Long hexagonal body threaded through its full length; wrench flats, no recess |
| Materials | Stainless steel 301 / 303 / 304 / 304L / 316 / 316L / 410 / 416 / 17-4PH · carbon steel 1045 / 1215 / 12L14 · alloy steel 4130 / 4140 · aluminium 2024 / 5052 / 6061 / 7075 · brass · bronze · copper · titanium |
| Finishes | As machined · black oxide · zinc plating · nickel plating · chrome plating · anodizing · passivation (through our vetted partner network) |
| Precision | ±0.01 mm on features that locate, seal or fit; ISO 2768-m for general dimensions |
| Marking | Head marking, grade marking or your own identification mark per drawing |
| Documents | Material certificate (MTR) with every batch, plus pre-shipment photos before dispatch |
| MOQ | From 50 pieces per type and material · samples from 1 piece |
| Sample lead time | 5–10 days |
| Production lead time | 25–35 days after sample approval |
| Quote | Within 24 hours, with DFM feedback |
Other nuts we manufacture
See all 179 part types →
Send us the drawing
We reply within 24 hours with DFM feedback, a process route and a price. Samples from 1 piece, production from 50 pieces, shipped from Qidong City, Jiangsu Province, China.
Request a quote