BUYER QUESTIONSSourcing hex bolts from China
What should a hex-bolt RFQ include beyond “M16 hex bolt”?
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A useful hex-bolt RFQ names the controlling standard and edition (for example DIN 933 vs DIN 931 vs ISO 4017 vs ISO 4014), length datum, property class, finish, quantity, destination, and required documents. Add head style, partial vs full thread, and grip length when the assembly cares. Class labels such as 6.8 / 10.9 / 12.9 on published catalogue rows are labels on those rows, not confirmed stock. Send one RFQ line per configuration—do not mix unfinished diameter, length, and class variants into a single line. Use the on-page RFQ starting point, then email [email protected] or WhatsApp +65 9869 5891 when the specification line is ready.
Are DIN-labelled and ISO-labelled catalogue rows interchangeable?
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Do not assume DIN 931 / 933 ↔ ISO 4014 / 4017 interchange from a shared diameter envelope. Compare dimensional and mechanical requirements against the edition you will buy, and obtain engineering approval for any proposed substitution. Atlas lists DIN- and ISO-labelled rows (including GAOQIANG catalogue envelopes such as M6–M100) as discovery starting points, not as proof that two rows are interchangeable substitutes. Pick one controlling standard on the RFQ and state the edition string. For how to read fastener standards in general, use https://honyawnatlas.com/knowledge/fastener-standards/—this family FAQ does not rewrite that desk.
How should I read cold-forged vs hot-forged diameter ranges on Atlas?
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On the Gem-Year hexagon-head bolt rows published on this page, the metric envelope is listed as M4–M36 cold forged and M39–M64 hot forged. Those figures describe catalogue envelopes, not current inventory and not a promise that every length or class inside the band is available. Ask which process applies to your diameter and length before you agree commercial terms. Do not read a cold/hot split from a different manufacturer’s diameter-only catalogue row as if it were the same statement. Confirm process, class, and finish in the supplier’s written reply. Contact: [email protected] · WhatsApp +65 9869 5891.
Which documents and samples are typical for hex-bolt sourcing?
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Ask for material or property evidence and dimensional checks that match the order class—not a generic certificate title. Typical RFQ lines: sample loop yes/no; dimensional report scope; material documentation as required by the buyer; packing and label marks. Use https://honyawnatlas.com/knowledge/quality-documents/ for how to read issuer and lot linkage; this FAQ does not invent ISO or IATF numbers Atlas does not publish. List docs and samples on the first email so the sample loop and production quantity share one scope. Confirm acceptance in the supplier’s written reply before treating quote scope as agreed.
Steel-structure fastener series vs general hex bolts — same RFQ?
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No—not automatically. Gem-Year publishes a dedicated steel-structure fastener series on this page with its own listed standards and ranges (published metric production range M16–M30, cold forged). Those statements describe the series; they do not establish interchangeable assemblies with general hexagon-head bolt rows, and they do not establish current certification. Call out structural vs general on the RFQ, name the series file you are quoting, and keep assembly approval separate from a general hex RFQ. Confirm series, class, and documents in writing before Agree. Email [email protected] · WhatsApp +65 9869 5891.
