CBAM Exposure & Cost Estimator
Free tool for EU importers: 50-tonne exemption check + embedded-emissions & certificate-cost estimate for washer shipments.
Open tool →Technical Guides & Resources
Practical guides on stainless washer standards, specification and selection — covering the DIN, ISO and ASME families, how to write an RFQ that gets you an accurate quote, and the differences between lock washer types. Written by the people who manufacture them.
DIN, ISO & ASME Washer Standards: Cross-Reference
Map DIN, ISO and ASME washer standards — with a cross-reference table and the inch-vs-metric gotchas to avoid.
Read guide →How to Specify Stainless Washers for an RFQ
A buyer's checklist: exactly what to put in a washer RFQ to get an accurate quote in ~1 business day.
Read guide →Spring Lock vs Tooth Lock Washers
Split spring (DIN 127) vs internal/external tooth lock washers — how each locks, and which to choose.
Read guide →What Is a Mill Test Certificate (EN 10204 3.1)?
MTC types explained — and how a 3.1 certificate proves your stainless washers are genuine 304/316/316L, not a substitute.
Read guide →EU CBAM & Stainless Washers (2026)
What the EU carbon border mechanism means for washer imports — scope, the 50-tonne exemption, and who reports vs pays.
Read guide →Factory-Direct or Trading Company?
How to source washers from the actual factory (工贸一体) — price, control and how to spot a reseller vs the real maker.
Read guide →ISO 7089 / 7090 / 7092 / 7093 Explained
What each ISO washer standard means (series, grade, hardness) and the closest DIN equivalent for each.
Read guide →Stainless Washer Size Chart (M2–M64)
DIN 125, DIN 9021 and DIN 433 outer diameters & thickness side by side — see how big a washer you get for each bolt size.
Read guide →Washer Weight Calculator
Free tool: enter OD, bore & thickness (or pick a size) — get weight per piece and per 1,000 pcs, in 304 or 316.
Open tool →Ready to request a quote?
Send us your standard, size, material grade and quantity — we reply with pricing and lead time within one business day.
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Tell us what you need.
Send specs or a drawing and we will come back with pricing, lead time and material options. No account, no minimum to ask.
- ✓ 304 / 316 / 316L, DIN / ISO / ASME or custom
- ✓ Replies from engineers, typically within one business day
- ✓ MTC (EN 10204 3.1) and PMI available on request
- ✓ FOB Ningbo / CIF · HS 7318.22