Architectural Hardware & Fasteners
Door hardware, cabinet hardware, and fasteners for commercial and residential projects — product classes, common grades, and how to compare supplier quotes without guesswork.
Explore the hardware guides →
Independent sourcing intelligence
ChinaCustomParts
The neutral, certification-focused guide to sourcing hardware & custom parts from China.
Straight-talking research on architectural hardware, fasteners, custom manufacturing, and the certifications that matter — written for buyers who want to verify before they commit.
Free to read · No commissions · Not a factory, not a marketplace
Start with your product category
Two sourcing tracks cover most industrial import projects. Each one links to guides that are dated and cited to primary sources.
Custom CNC & Sheet Metal Parts
From prototype to production: sheet metal fabrication, CNC machining, and surface finishing — including the specifications, tolerances, and documentation buyers should ask for.
Explore the manufacturing guides →Popular guides
Each guide below is dated and names the primary source behind its figures.
CNC Machining in China: A Design & Sourcing Guide
Process selection, material grades and their standards, tolerances and GD&T, surface finishing, DFM rules, and how to verify a supplier before you order.
Read the guide →How to Find a Manufacturer in China
Prepare the data package, read the channel signals, tell a trading company from a real factory, query the official records yourself, and test the relationship on a limited first order.
Read the guide →ASTM, CE & UL: Comparing Common Marks
What these marks are, where they are commonly referenced, and what they do — and don't — certify.
Read the guide →Factory Audits: What to Verify On-Site
Ownership, equipment, processes, and documentation checks to run before you commit to a supplier.
Read the guide →Not a factory. Not a marketplace.
ChinaCustomParts exists to close the information gap between supplier marketing and buyer reality. Our independence is the product.
Independent by design
We do not sell parts, broker orders, or collect commissions from suppliers. Nothing on this site is paid placement, and no factory or platform can buy coverage or ranking.
Certification-focused
We translate standards and certification questions — such as references to ASTM, CE, and UL marks — into practical buying context. We never invent clauses, grades, or figures we have not verified.
Honest about progress
Detailed guides carry a retrieval date and name the official or standards-body source behind each figure. Where a figure could not be confirmed from a primary source, the page says so.
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