Primary process: Cold Forging / Heading. The full route, materials, tolerances and design tips for a hex key, with an indicative cost.
Cold Forging / HeadingPrimary process
Bulk formingFamily
6Route steps
+/-0.05mmTypical tol.
A hex key is primarily made by Cold Forging / Heading. Cold forging (cold heading) forms metal at room temperature by forcing it into a die, work-hardening the part and giving an excellent finish with almost no waste. Below is the full route to make a hex key, the materials it suits, the tolerances to expect and the main design points. The route is free, from the finder.
Step by step
How a hex key is made
The usual route, raw material to finished part. The amber step is where the hex key gets its basic shape.
Material
Cut billet or bar stock to size for the hex key.
Cold Forging / Heading
Force the metal to shape at room temperature: the grain follows the form and gives the hex key its strength.
Tooling High Tolerance ±0.05 to 0.25mm Lead 8 to 16 weeks
Trimming
Trim the flash and pierce any webs the dies leave behind.
Heat treatment
Normalise, quench and temper to the final mechanical properties.
Tooling n/a Tolerance can distort Lead days
Machining
Machine the bearing surfaces, threads and precise features to tolerance.
Tooling None Tolerance ±0.125mm, to ±0.025mm Lead 1 to 10 days
Inspection
Dimensional check plus crack detection on safety-critical parts.
Need the real cost for a hex key? The free route above is yours. Unlock the full dossier to quote and source it.
Where this process typically lands. Tighter is possible with extra operations like grinding, at higher cost.
Materials
Materials for a hex key
Grade
Why it suits this
Low-carbon wire (CHQ)
Cold-heading quality
Alloy steel wire
Higher strength bolts
Stainless/alu wire
Corrosion/light
Design
Design tips
General pointers. The full design-for-manufacturing list for a hex key is in the dossier.
Features that can't be cold-formed.Design to heading limits.
Over-tight head tolerance.Open to standard.
Cost
What a hex key should cost
Fasteners and near-net parts at huge volume; pennies per part once tooled. A high-volume game.
PER-PART COST vs VOLUME
Per-part cost drops as volume spreads tooling and setup over more parts. The exact figures for a hex key at your volume, in your currency, are in the dossier.
MODEL EST.
$0.15 to 0.32per part at 1,000 off
A rough ballpark only. The dossier gives should-cost at your exact volume and currency, with the full breakdown.
GET THE FULL DOSSIER
Everything you need to quote and source it
The free route above is yours. To actually put a number on a hex key and buy it well:
Should-cost at your exact volume in 12 currencies, with the material, processing, tooling and overhead breakdown
Who to source from, typical MOQ and lead time, and the exact RFQ checklist to send
A quote checker that tells you if a supplier quote is fair, and the red flags to watch
SistematikWork is a whole IE platform. Past the free finder, there are 41 ready Excel calculators, templates and CAD guides, each built from real coursework and checked against known values.
Manufacturing & OperationsQuality & ReliabilitySupply ChainProject & StatisticsEngineering Career
A hex key is primarily made by cold forging / heading. The route is: Material; Cold Forging / Heading; Trimming; Heat treatment; Machining; Inspection.
What does a hex key cost?
It depends on size, tolerance and volume. As a rough ballpark it starts around $0.15 to 0.32 per part at 1,000 off and falls with quantity. The dossier gives should-cost at your exact volume and currency. A model estimate, not a quote.
What material is a hex key made from?
Common choices are Low-carbon wire (CHQ); Alloy steel wire; Stainless/alu wire.
What is the main process for a hex key?
Cold Forging / Heading. High-volume small parts like fasteners, pins and studs where strength and material yield matter.
See the exact route and should-cost for your part
The free finder maps your part to its process and full route. Pro adds should-cost at your volume, sourcing and an RFQ draft.
