Typical component families for electrical equipment and distribution — brass connection terminals, slotted contacts, RF connector housings and pins — and how Swiss-type turning (décolletage) with coordinated plating serves recurring monthly series.
| Connection terminals (bornes) | CuZn39Pb3 / C360, forged |
| Slotted contacts | Brass, C17200 beryllium copper |
| Pins with plating | Brass, gold/tin plated |
| Batch range | 10,000–100,000 pcs per family |
| Tolerance scheme | DIN ISO 2768-mK, drawing fits |
| Documentation | EN 10204 3.1, RoHS/REACH |
The electrical equipment and distribution industry is structured around large manufacturers and very large distributors, and both continuously need small brass precision components: connection terminals, slotted contacts, RF connector housings, pins and terminal fittings. These are recurring, high-volume parts — Swiss-type turning (décolletage) and cold forging are the natural processes.
The sourcing pattern is part drawing or part number, a certificate package (RoHS/REACH, EN 10204 3.1), and stable recurring series. Plating — gold or tin on contact surfaces, zinc elsewhere — is coordinated within the process chain so components arrive assembly-ready.
| Component (FR / EN) | Typical material | Process | Typical batch |
|---|---|---|---|
| bornes de raccordement (connection terminals) | CuZn39Pb3 / C360 | Swiss turning + cold forging | 10,000+ pcs/month |
| contacts fendus (slotted contacts) | brass, C17200 beryllium copper | Swiss-type turning | 5,000–50,000 pcs |
| corps de connecteurs RF (RF connector housings) | brass, aluminum | Swiss turning + turn-milling | 2,000–20,000 pcs |
| broches (pins) | brass + gold/tin plating | Swiss turning + coordinated plating | 10,000–100,000 pcs |
| cosses / raccords électriques (terminals, electrical fittings) | brass, copper | cold forging + turning | 10,000+ pcs |
Part designations follow standard connector-industry drawing practice.
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.
Can plating be coordinated within the supply?
Yes — gold and tin plating on contact surfaces is coordinated within the process chain, with plating thickness confirmed per drawing.
Do you machine beryllium copper (C17200)?
Yes — C17200 is an established material in our Swiss-turning portfolio, alongside free-machining brass grades such as CuZn39Pb3 and C360.
Which batch sizes are typical?
Component families in this vertical typically run 10,000–100,000 pieces per order with recurring monthly call-offs.
Do you supply from part numbers or from drawings?
Both — drawing-based specials and part-number based repeat components, with RoHS/REACH declarations included in the documentation package.
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