YIWAN Hardware is Yueqing Yiwan Hardware Products Co., Ltd., a fastener and precision-parts factory in Yueqing City, Wenzhou, Zhejiang, China. We make custom rivets, semi-tubular rivets, pins, screws, nuts and CNC-machined components to drawing for OEM customers, in copper, brass, carbon steel, aluminium and stainless steel. Multi-station cold heading, CNC turning, automatic lathes, knurling, drilling, grinding and punch pressing all run inside one plant, which is the reason a non-standard part here does not have to travel between three subcontractors before it ships.
If you found this page by searching for Yiwan Hardware, you are most likely doing one of two things: checking whether the factory behind a quotation is real, or looking for someone who will actually make the odd part your standard supplier declined. This page answers both. It sets out exactly what we produce, what equipment produces it, how a drawing becomes a sampled and approved part, and what to put in your first email so you get a price instead of a question.
What Yiwan Hardware manufactures
Our catalogue is organised by part family, and almost every line in it can be modified — head geometry, shank steps, length, material, finish. The families below link straight to the dimensioned product pages.
Rivets. Semi-tubular rivets and stainless steel tubular rivets are our highest-volume work, alongside tubular and hollow rivets, step rivets, step flat head rivets, solid stepped long rivets, Chicago rivets and binding posts, contact rivets and internally threaded copper rivets. If you need help selecting one, our rivet size chart carries the DIN 7337, DIN 660 and IFI-114 tables our own engineers work from.
Screws. Customized screws and irregular screws cover the parts with no standard number, and the standard range includes stainless steel screws, copper screws, hex socket screws, hex socket pan head screws, step screws, Phillips head stepped screws, slotted screws, knurled screws, square head screws, ball head screws, eccentric screws, double end screws and studs, set screws, screws with hole, shaft screws and machine screws, plus door lock screws and switch screws for the two industries we know best.
Nuts. Hex nuts, square nuts, T-nuts, cap nuts, rivet nuts, internal and external thread nuts, and a deep range of insert nuts for plastics: embedded nuts, embedded knurled nuts, knurled nuts, copper knurled nuts and copper embedded nuts.
Pins and turned parts. Pipe pins, stainless steel knurled pins, fully threaded rod, hollow tube, knurled non-slip cylinders and hex wrenches.
Custom and non-standard parts. The custom parts section is where most enquiries end up: customized fasteners, customized hardware parts, customized parts, customized irregular parts and irregular inserts.
Application-specific hardware. Contact parts and contact points for switchgear, lock hardware accessories including hardware spare parts and stainless steel hardware accessories, and washers and small parts including stainless steel small parts.
The factory: what each process is for
A custom fastener is rarely made by one machine. The part that costs too much is almost always the part routed to the wrong process, so it is worth knowing which of ours would make yours.
| Process | What it does | Where it wins |
|---|---|---|
| Multi-station cold upsetting (cold heading) | Forms heads and shanks from wire in progressive dies, no chips | High volumes, grain-flow strength, lowest unit cost above a few tens of thousands |
| CNC turning | Cuts complex profiles, tight tolerances, features cold heading cannot form | Low to mid volumes, prototypes, stepped and eccentric geometry |
| Automatic lathes (Taiwan and Ningbo type) | Continuous turning of simpler profiles | Mid-volume pins, sleeves, plain shanks at a lower rate than CNC |
| Manual instrument lathes | One-off and short-run turning, sample work | First articles and drawing verification before tooling |
| Punch press | Blanks and forms sheet components | Washers, contacts, flat and irregular stampings |
| Knurling, drilling, grinding | Secondary operations | Grip surfaces, cross holes, finished diameters and surface control |
The practical consequence for a buyer is this. Cold heading carries a tooling cost and repays it in unit price, so it is the right answer for an annual volume in the hundreds of thousands. CNC and instrument work carry no tooling cost and a higher unit price, so they are the right answer for a first production batch, a service part, or a part whose geometry no die can form. Because both live in the same plant, we can quote your part the cheap way and the fast way and let you choose, rather than pushing you toward whichever process we happen to own.
How a drawing becomes a production part
mermaid height=380
flowchart LR
A[Your drawing<br/>or sample] --> B[Engineering review<br/>process + material]
B --> C[Quotation<br/>tooling, unit price, lead time]
C --> D[Sample<br/>instrument or CNC]
D --> E{Your approval}
E -->|Revise| B
E -->|Approved| F[Tooling / setup]
F --> G[Production +<br/>inspection]
G --> H[Packing<br/>and shipment]
The review step is the one that saves money, and it is the reason we ask for an application rather than only a drawing. Sending a part to be quoted exactly as drawn is easy; telling you that a 0.02 mm tolerance on a non-functional diameter is doubling your price, or that switching a 4.0 mm rivet from aluminium to A2 stainless triples its shear load without touching your holes or tooling, requires knowing what the part has to survive.
Quality control
Inspection here runs on optical image screening machines for automated sorting, projectors for profile and dimensional verification, and full inspection where a drawing or an application calls for it. Optical sorting matters most on cold-headed parts in high volume, because it catches the mixed, short-formed and burred pieces that a sampling plan would statistically pass and your assembly line would then stop for.
Quality documentation available on request: [insert certifications — e.g. ISO 9001, material certificates, RoHS, salt-spray reports].
Industries we supply
Electrical hardware and switchgear, door lock and lock hardware assemblies, automotive components, instrument and meter parts, industrial assembly and machinery. These are not aspirational markets — they are where the bulk of our existing tooling and process experience already sits, which is worth knowing when you compare our quotation against a general fastener trader’s.
Send these with your first enquiry and you will get a real price, not a range.
- Drawing (PDF, DWG or STEP) or a photo of the sample, with dimensions
- Material and, if it matters, the grade — 304, 316, brass, copper, carbon steel, aluminium
- Surface finish or plating, plus any salt-spray hours you must pass
- Annual quantity and expected order pattern
- The application and service environment: indoor, outdoor, washdown, electrical, automotive
- Which dimensions are functional and which are reference — this is the single biggest lever on your price
- Packaging: bulk, boxed count, or tape-and-reel for automated feeding
Working with Yiwan Hardware
If a part is standard and you need it cheap, plenty of suppliers can help you. The case for a factory like this one is narrower and more specific: a stepped shank that no catalogue carries, a head diameter between two standard sizes, a stainless grade substitution three weeks before a production date, a semi-tubular rivet whose end-hole depth has to change because the clinch is cracking. Non-standard is routine work here rather than an exception, and because forming, machining and inspection sit under one roof, a sample cycle does not queue behind an outside supplier’s schedule.
Send your drawing or the seven items above to [insert sales email]. Sample lead time is typically [insert sample lead time], production lead time [insert production lead time], and our minimum order quantity is [insert MOQ]. You can also reach us through the contact page, or read more about the company on our about page.
Frequently asked questions
Is Yiwan Hardware a factory or a trading company? A factory. Yueqing Yiwan Hardware Products Co., Ltd. operates its own multi-station cold upsetting, CNC, automatic lathe, instrument lathe and punch press capacity in Yueqing City, Zhejiang. Drawings, sampling and inspection are handled in-house rather than passed to a third party.
Where is Yiwan Hardware located? Yueqing City, Wenzhou, Zhejiang Province, China — inside the electrical and fastener manufacturing cluster that supplies most of China’s low-voltage electrical hardware.
What materials do you work in? Copper and brass, carbon steel, aluminium, and stainless steel including 304 and 316. Material substitution is one of the cheapest ways to change a part’s strength or corrosion performance, so ask before you redesign.
Do you make parts to our drawing, or only catalogue items? Both, and custom work is the larger share. Send a drawing, a sample, or even a dimensioned photograph with the application described, and we will tell you which process suits it.
What is your minimum order quantity? [insert MOQ]. It varies by process: cold-headed parts have a higher practical minimum than CNC-turned parts because of the die setup, so a small first batch is often quoted as a machined part and later converted to cold heading as volume grows.
Can you provide samples before production? Yes. Sample lead time is typically [insert sample lead time]. Samples are usually produced on instrument or CNC equipment so you can approve geometry and fit before any tooling is committed.
Which certifications can you supply? [insert certifications]. Material certificates and inspection reports can be issued with shipment on request.
How do I choose a rivet size for my assembly? Diameter follows your thickest sheet and length follows the grip range, not a formula. Our rivet size chart has the full metric and inch tables, hole and drill sizes, and minimum shear and tensile values by material.