| 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 |
An automotive fastener that fails never fails alone — it takes a module, a recall budget and a brand reputation with it. Our stainless automotive fastener program is built on the boring disciplines: gauged threads, certified material and coatings with salt-spray receipts.
What we manufacture: hex and flange bolts M5–M16; wheel-hub studs and press-in pins; bracket screws with integrated washers; hollow and vented screws for sensor housings; custom shoulder bolts and specialty clamp hardware in 304/316/410 and 431 stainless.
Threads that never cross: rolled threads where the spec allows (stronger roots, smoother flanks), single-point or thread-milled where geometry is custom. Every lot runs Go/No-Go gauging at 6H/6g minimum; torque-tension testing validates critical joints on sampling plans.
Coatings with paperwork: Dacromet and Zn-Ni for underbody and winter markets, passivation for engine-bay stainless, with 500h+ salt-spray certificates per batch. Vibration-loosening options include all-metal prevailing-torque nuts and pre-applied nylon patches.
Automotive rhythm: Kanban and JIT call-off programs, PPAP documentation on request, and lot-level traceability from mill cert to shipped carton — the audit trail your quality team already knows how to read.
6H/6g Go/No-Go on 100% of batches; torque-tension validated on critical joints.
500h+ salt-spray reports ship with each coating batch — underbody proof, not promises.
Kanban/JIT replenishment keeps your line fed; lot traceability runs mill-to-carton.
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.
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.
