| Tolerance Type | Description |
| Precision Tolerance | Parts are manufactured and inspected strictly according to your drawing specifications and GD&T annotations, with a minimum tolerance of ±0.05 mm. |
| General Tolerance | ±0.05 mm |
| Minimum Feature Size | 0.5 mm. The exact minimum feature size may vary depending on the part geometry and selected material. |
| Threading & Tapped Holes | Capable of machining any standard thread sizes, as well as customized thread specifications. |
| Edge Condition | Sharp edges are deburred and chamfered by default. |
| Surface Finishing | Anodizing, Powder Coating, Spray Painting, Laser Engraving, Silk Screen Printing |
| Minimum Wall Thickness | 0.5mm |
| Minimum End Mill Size | 0.5mm |
| Minimum Drill Hole Size | 1mm |
| Minimum Part Size | CNC Milling: 5 × 5 × 5 mm; CNC Turning: 2 × 2 mm; |
| Maximum Part Size | CNC Milling: 4000 × 1500 × 600 mm
CNC Turning: 200 × 500 mm |
A turned nut or stud is judged in the second it threads on: cross-thread and the part is scrap. Our turning program is built around thread quality first — gauge-controlled, not assumption-controlled.
What we turn: hex and round nuts M2–M39, threaded studs and standoffs, knurled thumb nuts, flanged bushings and custom fastener geometries in brass (C3604), free-cutting stainless (303), 304, and 6061/6063 aluminum. Go/No-Go thread gauging on every lot, with class 6H/6g or your specified fit.
Where CNC turning beats cold heading: cold-headed fasteners are cheap at 10 million pieces but trap you in standard geometry. Turned parts take custom flange diameters, coaxial shoulders, cross-drilled features and special threads — with dimensional reports your aerospace or medical customer will actually accept.
Threads done right: single-point or thread-milled (never die-tapped on critical pitches), deburred with thread protection caps, torque-tested on sampling plans. Anti-seize coatings, nylon pellets and thread-locking patches applied on request.
Beyond the thread: knurling patterns, hex flats, slots and Torx recesses machined in-cycle; passivation, anodize and zinc plating after. Typical batch 1,000–200,000 pieces, Kanban replenishment for line-down critical fasteners.
100% Go/No-Go sampling per batch on class 6H/6g threads — your assembly line never fights a cross-threaded nut again.
Flanges, shoulders, cross-holes, knurls and special pitches machined from bar stock — geometry cold heading cannot touch.
Standing replenishment programs keep critical fasteners flowing; 1,000-piece minimums, 24h quote on drawings.
From aerospace-grade aluminum to medical-certified engineering plastics, our in-house CNC machining centers work a broad range of metals and plastics under one roof.
Don’t see your material? Send your drawing for review — we will confirm availability and quote it.
Functional and cosmetic finishes applied in-house or through vetted partners.
Type II protective anodize, natural silver finish.
Type III hard coat, wear-resistant black.
Blue, red, gold, green dye for audio and 3C.
Uniform matte texture, hides machining marks.
Durable corrosion-resistant RAL colors.
Removes free iron, boosts stainless corrosion.
Zinc, nickel, chrome, tin for connectors.
Permanent non-contact logos and serials.
Custom CNC milled black anodized aluminum parts with threaded and through holes for precision machinery, robotics and industrial tooling.
View Product →
Aluminum CNC machining + laser cutting + hard anodizing service — ±0.005mm, IATF 16949, in-house hard anodizing.
View Product →
High-efficiency VMCs for prototype, mid-volume and large-batch metal parts production.
Integrated drilling, tapping and milling shortens lead time for aluminum enclosures.
Combined drilling-milling lines support both small batches and volume OEM orders.
Well-organized production zones support everything from one-off parts to mass programs.
Systematic line layout raises machining efficiency and guarantees on-time delivery.
Complete CNC equipment set enables stable continuous running for OEM volumes.
Dongguan, China · 200+ CNC machines · In-house anodizing & laser cutting · Visitors and third-party inspections welcome.
Fully certified quality management system. Every batch ships with material certificates and inspection reports you can trust.
Our engineers review every drawing upfront — flagging tolerances, undercuts and cost drivers before a single chip is cut.
Custom foam, wooden crates and FBA-ready packaging. Door-to-door freight to 60+ countries with full tracking.
Your message lands directly with our senior engineers — instantly acknowledged.
We study your requirements and propose a workable solution with material & process options.
Detailed quotation with specs, options and lead time — no hidden fees.
Approve the sample, then we mass-produce with full QC and on-time shipping.
WhatsApp: +86 13790500374
Email: info@rejincnc.com
Your CAD files are kept strictly confidential. Quotation within 24 hours.