Square Nuts
Square nuts for timber, channel and applications where a spanner has no room to turn.
Square nuts where the corners are what grip - inside a channel, against a timber face, or where the nut must not rotate. A fraction more bearing area than a hex of the same size.
How we make it: Swiss CNC machining service →
3–5 weeks
1000 pieces
ISO 9001:2015
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Thread range | M5–M24 | metric |
| Across-flats | ±0.2 | mm |
| Thread class | 6H | - |
| Standard | DIN 557 / 562 | - |
| Spanner hold | Four positions | note |
| Thickness | ±0.15 | mm |
Available Materials
- Steel 8.8
- Hot-dip galvanised steel
- Stainless A2 / A4
- Brass
Typical Applications
- Timber connections
- Channel and strut systems
- Bolt-on hardware
- Marine fittings
- Agricultural equipment
Surface Finishes
- Hot-dip galvanising
- Zinc plating
- Passivate
- Zinc flake
- Painted
Industries Served
- Warehousing
- Building Services
- Agricultural Machinery
- Marine
- Industrial Equipment
What drives the price of this part
Derived from the callouts on this page. Where a driver is not on the drawing, it is not on this list.
- Part size
- Thread range at M5–M24 metric decides which machine the part lands on and how many setups it needs. Size is the driver buyers most often leave out of a first enquiry, and it is the one that changes the quote fastest.
- Order size
- Minimum order is 1000 pieces, where setup and tooling are amortised across the batch and per-part cost settles around cycle time and material. Below that quantity the same part costs more per piece, not less.
- Certification and paperwork
- ISO 9001:2015. On a certified family the inspection and documentation work is part of the price: first article inspection, material traceability and the dimensional report are produced per order, not per sample.
See how cycle time is calculated in the machining time calculator and what else moves a price in the cost driver reference.
How these parts are inspected
Matched to the callouts above and the instruments actually on the floor.
- Coordinate measuring machine (Zeiss CONTURA G2, two machines, GR&R 8.4% on the critical feature)
- Dimensional report against the drawing, with a 100% check on critical features rather than a sample
- Certificate of conformance and the mill certificate with every shipment
- Thread gauges over the full thread range on the drawing
The full equipment list, with counts, is on the capability page; the inspection sequence is on quality and inspection.
Questions buyers ask
- Why use a square nut in a channel?
- Because the flat sides bear against the channel walls and stop it turning while you tighten from the other end. A hex nut will rotate in the channel with the wrench.
Related part families
Hex Head Bolts
Hex bolts to DIN 931/933 in 8.8, 10.9 and stainless, rolled threads and full certs.
Square Washers & Plate Washers
Square and rectangular plate washers that spread load on timber and slotted holes.
Custom Nuts
Hex, flange, nylon-insert and weld nuts to DIN/ISO/ASTM, M3–M48, with lot testing.