Distributors and OEMs buy special fasteners by drawing or part number, and they expect tiered pricing, clean item data and certificates without chasing. We cold-head and thread-roll screws, studs and pins in alloy and stainless steel from 5,000 pieces, quote tiered prices within 48 hours, attach the full document pack and ship the first batch in 3 to 5 weeks.
| Special screws & studs | Alloy steel, cold-headed |
| Pins & dowels | Stainless, hardened, ground |
| Custom nuts & specials | Stainless, per drawing |
| Batch range | 5,000–100,000 pcs |
| Strength classes | 8.8 / 10.9 / 12.9, A2 / A4 |
| Documents | EN 10204 3.1, RoHS / REACH |
Fastener distribution runs on item master data: part numbers, tiered prices, certificates and labels that match the catalogue without rework. Buyers lose weeks when suppliers re-quote from scratch or send certificates late. We quote from your drawing or part number with tiered prices in 48 hours, and the document pack travels with the first shipment as standard, so the item goes live in your system on the first attempt. Certificates arriving late hold the goods in your warehouse just as surely as a short shipment, which is why the document pack is part of the product here rather than an afterthought at dispatch.
Cold heading on presses up to 180 tonnes with thread rolling gives full-strength threads at distribution-friendly prices from 5,000 pieces. Stainless and high-strength classes run on the same lines, custom labels carry your article numbers and per-bag counts, and repeat orders ship against the stored specification with RoHS and REACH declarations attached automatically. DDP delivery lands in 5 to 8 days by air, or by sea for planned call-offs against forecast. Air freight keeps replenishment cycles short, but sea freight against forecast is quoted for the volume classes where the schedule allows it.
| Component (IT / EN) | Typical material | Process | Typical batch |
|---|---|---|---|
| Special screws (특수 볼트) | Alloy steel 10.9 | Cold heading + rolling | 5,000+ |
| Studs | Alloy steel | Cold heading + rolling | 5,000+ |
| Pins & dowels | Stainless, hardened | Turning + grinding | 1,000–50,000 |
| Custom nuts | Stainless A2/A4 | Cold heading, turning | 10,000+ |
Tooling costs quoted separately and amortized across the series on request; tools reserved per part number.
The standard flow: drawing review and quotation within 48 hours, first samples in 7–15 days, first article inspection and approval, then series production against the approved reference. Tooling, program revisions and inspection records are kept on file so that call-offs remain consistent with the approved first article.
Engineering changes — material substitutions, tolerance updates, plating or packaging changes — are handled as controlled changes against the same records.
DIN ISO 2768-mK applies as the default tolerance scheme for unspecified dimensions. EN 10204 3.1 inspection certificates are standard for metallic parts, First Article Inspection supports the approval step, and RoHS/REACH declarations are available where required. Plating, cleanliness and packaging requirements are confirmed per drawing.
Do you quote from part numbers?
Yes. Send the part number, a sample or the drawing and target annual volume; we quote tiered prices in 48 hours with the tooling cost shown separately. Where a catalogue reference exists, we match it against a purchased sample first, confirm the difference report, and lock the specification before the first production batch is released.
How do tooling costs work?
Cold-heading tools are quoted as a separate line based on geometry, typically from 1,500 dollars depending on complexity and size. On running items we amortize tooling into the piece price across the agreed volume, so your landed cost stays flat, and the tool remains reserved for your part number for the life of the program.
What documents ship with the goods?
Every batch ships with EN 10204 3.1 certificates carrying the heat number, plus RoHS and REACH declarations and a dimensional report against the agreed drawing. Labels carry your article number, logo and per-bag counts to your template, so goods flow into your warehouse system without re-packing or re-labelling on arrival.
Which strength classes and materials run?
Carbon and alloy steels in 8.8, 10.9 and 12.9, stainless A2 and A4, and specials in precipitation-hardening grades on request. Cold heading covers the volume classes, sliding-head turning covers small and medium batches of geometric specials, and both routes ship with the same certificate and label structure so your item master stays uniform.
Send your drawing — Sinbo Precision will review material, tolerance scheme and batch plan and return a quotation within 48 hours. Samples in 7–15 days.
Get a Quote in 48 Hours