--- title: "Thread Rolling" description: "Thread Rolling for custom fasteners: what the process suits, what it does not, and which parts it produces. Samples in 7 days, MOQ from 2,000 pieces." url: https://engineeringhardware.com/custom/thread-rolling/ source: Engineering Hardware & Fasteners --- # Thread Rolling Thread Rolling · Fastener manufacturing process Send a drawing, a sample or a photograph. Samples follow within 7 days of the drawing being approved. Request a quotation One business day for a reply. subcategory-wheel-lug-hub-track-bolts Thread Rolling is used at Engineering Hardware to make custom bolts, screws, anchors & concrete fixings to a customer drawing. Forming a thread by pressing the blank between hardened dies, displacing metal rather than cutting it. The minimum order is 2,000–5,000 pieces and samples follow within 7 days of the drawing being approved. Forming a thread by pressing the blank between hardened dies, displacing metal rather than cutting it. A rolled thread is stronger than a cut one of the same size, and the reason is structural rather than marketing: the grain is displaced around the root instead of being severed, and the root itself ends up in compression. Fatigue failures in threaded parts almost always start at the thread root, which is why rolling is specified on anything that will see cyclic load. It is also faster than cutting and produces no swarf. The blank must be made to the pitch diameter, not the major diameter — a detail that surprises people the first time they reverse-engineer a rolled part. ## What Thread Rolling is the right choice for - Any thread that will carry fatigue or cyclic load - High volumes — rolling is much faster than cutting - Ductile materials that displace cleanly ## Where it is the wrong choice - Not practical on hardened material — the thread is rolled before heat treatment - Internal threads cannot be rolled this way (see tapping) - Interrupted or partial-length threads need care at the run-out ## Parts produced this way - [Custom Bolt](https://engineeringhardware.com/custom/bolts/) — [76 standard parts in the catalog](https://engineeringhardware.com/fasteners/bolts/) - [Custom Screw](https://engineeringhardware.com/custom/screws/) — [131 standard parts in the catalog](https://engineeringhardware.com/fasteners/screws/) - [Custom Anchor & Concrete Fixing](https://engineeringhardware.com/custom/anchors/) — [27 standard parts in the catalog](https://engineeringhardware.com/fasteners/anchors/) ## Usually combined with Thread Rolling is rarely the only operation on a part. On most jobs it sits in a sequence with: - [Cold Heading](https://engineeringhardware.com/custom/cold-heading/) - [Thread Turning](https://engineeringhardware.com/custom/thread-turning/) ## Order terms - **Minimum order:** 2,000–5,000 pieces. The exact figure depends on the part: it is set by the tooling the drawing calls for, and is confirmed when the drawing has been reviewed. - **Samples:** Within 7 days of drawing approval. - **Drawing:** Preferred, but not required — a sample, photographs or a sketch is enough to start. ## What a quotation needs Nine things, and a drawing settles most of them at once. Where a field is unknown, say so — an assumption stated is better than a blank, and several of these can be recommended rather than specified. - **Drawing:** A 2D drawing (PDF or DWG) or a 3D model settles almost every other question on this list at once. - **Dimensions:** Diameter, length, head size and any features — enough to know what is being made. - **Tolerance:** Tolerance is the single biggest cost driver. Tell us which dimensions are critical and which are not — holding everything tight costs money on features nobody measures. - **Material:** Carbon steel, alloy steel, stainless, brass, aluminium, titanium — or the application, and we will suggest one. - **Strength grade:** Property class to ISO 898-1 (8.8, 10.9, 12.9) or stainless class to ISO 3506 (A2-70, A4-80). This decides the material and the heat treatment together. - **Thread standard:** Metric coarse, metric fine, UNC, UNF, BSW or a pipe thread — and the tolerance class if it is specified. - **Surface finish:** Zinc, hot-dip galvanised, black oxide, Dacromet, Geomet, nickel, passivation, or plain. Salt-spray hours if you have a requirement. - **Quantity:** Annual volume and first-order quantity. Volume changes which process is the right one, so it changes the price more than most buyers expect. - **Application & environment:** What the part holds together, and what it has to survive — temperature, vibration, chemicals, salt. This is what lets us catch a specification that will not work before it is made. ## Draw it here No CAD, no account, nothing to install. Draw the part in your browser, generate a real ISO metric thread from M1 to M100 with the end treatment it needs, dimension it, and export a PDF or a DXF to attach below. Sheets run to two metres for long studs and threaded rod. Open the drawing builder ## Questions ### What is the minimum order quantity for a custom part? Between 2,000 and 5,000 pieces for most parts. The exact figure depends on the part: it is set by the tooling the drawing calls for, and is confirmed when the drawing has been reviewed. ### How long does a sample take? Within 7 days once the drawing has been approved. The drawing stage comes first, and for a part being reverse-engineered from a sample it is where most of the time goes. ### Can you make a part without a drawing? Yes. A physical sample, photographs against a scale, or a dimensioned sketch are all workable starting points. A drawing is produced from whichever of those you have and sent back for approval before anything is made. ### When is Thread Rolling not the right process? Not practical on hardened material — the thread is rolled before heat treatment. Internal threads cannot be rolled this way (see tapping). Interrupted or partial-length threads need care at the run-out. ### Which fasteners are made by thread rolling? In this catalog: bolt, screw, anchor & concrete fixing. Whether it is the right process for a particular part depends on the drawing and the quantity. ## Parts of this kind we already make Showing 36 of 77 081 – Swing Bolt — GB／T 77 ／ ISO 4026 (Series 020) — GB／T 77 ／ ISO 4026 097 – Lifting Eye Bolt — GB／T 825 ／ DIN 580 (Series 036) — GB／T 825 ／ DIN 580 098 – Lifting Eye Bolt — GB／T 825 ／ DIN 580 (Series 037) — GB／T 825 ／ DIN 580 118 – Hex Bolt — GB／T 6173 ／ ISO 8675 (Series 057) — GB／T 6173 ／ ISO 8675 12-Point Screws – Bolts 12-Point-Screws-Bolts-Applications Anchor-Bolts-GB-T-799-DIN-529 asme-b18-5-2-unc-carriage-bolt Bicycle-Bottle-Cage-Rack-and-Fender-Bolts Bicycle-Brake-Caliper-Mounting-Bolts Bicycle-Cleat-Fixing-Bolts Bicycle-Disc-Brake-Rotor-Bolts Bicycle-Stem-and-Headset-Bolts Carbon-Steel-Stainless-Eye-Swing-Bolts Carriage Bolts — DIN 603 category-bolts Concrete-Coil-Rods-Coil-Nuts-and-Coil-Bolts Concrete-Formwork-Wedge-Bolts din-478-square-head-bolt-with-collar Elevator Bolts Elevator-Bolts-Applications Equal-End Stud Bolt — GB – T 901 – DIN 939 (Series 093) — GB – T 901 – DIN 939 Exhaust-U-Bolt-and-Band-Clamps Eye Bolts — DIN 580 Fitted-Bolts-DIN-609 Foundation-Bolts-L-J gn-505-4-serrated-t-slot-bolt Heavy-Duty-Blind-Bolts Heavy-Hex-Structural-Bolts Hex Bolts — ISO 4014 ／ ISO 4017 Hex Bolts — ISO 4014 ／ ISO 4017 Detail Hex Bolts, Grade C — ISO 4016 Hex Flange Bolts — ISO 1665 ／ DIN 6921 Huck-C50L-Large-Diameter-Lockbolt-Assembly Huck-C6L-Small-Diameter-Lockbolt-Assembly Huck-Magna-Grip-Lockbolt-Assembly These are catalog parts, shown to say what the tooling already covers. A special is quoted from your drawing, not from this list. ## Drawing builder Draw the part, dimension it, and export a PDF or a DXF to attach to the form below. FASTENER **DRAWING** CMD Fastener drawing builder [https://engineeringhardware.com/](https://engineeringhardware.com/) Nothing you draw is uploaded until you send it, and the drawing lives in your own browser — export it before you close the tab. ## Send the part A drawing answers most of this at once. If you do not have one, fill in what you know and attach a photograph — samples follow within 7 days of the drawing being approved.