Short answer: A fastener quote becomes usable when every line identifies the standard, dimensions, material or grade, finish, quantity, packaging and required release date. “M8 bolts, 10,000 pieces” is a starting message, not a complete RFQ.
Use it when one request combines DIN, ISO, GB/T or ASTM/ASME fasteners with split releases, private-label cartons, small batches or mixed-container quantities.
Why incomplete RFQs create slow or inaccurate quotes
Fasteners that look similar can differ in thread, head geometry, strength class, coating, tolerance and inspection requirements. If those fields are missing, a supplier has to ask clarification questions before confirming price or lead time. A quoted price is not comparable when one supplier has assumed the finish, another has excluded inspection records, and neither knows the required release date.
A clear RFQ also makes it easier to compare quotations from different suppliers. Use one line per specification and keep the buyer's requested unit visible: pieces, kilograms, cartons or sets.
The 12 fields every fastener RFQ should include
| # | RFQ field | Example of useful detail | What it prevents |
|---|---|---|---|
| 1 | Part description | Fully threaded hex bolt, flange nut, anchor or custom item | Confusion between visually similar parts |
| 2 | Standard | DIN 933, ISO 4017, GB/T 5783, ASTM/ASME or drawing number | Uncontrolled “equivalent” substitutions |
| 3 | Dimensions | Diameter, length, thread pitch, head size and tolerance where relevant | Fit and thread-engagement errors |
| 4 | Thread | Metric or imperial, coarse or fine, right-hand or special thread | Parts that cannot mate on the assembly line |
| 5 | Material and grade | Carbon steel 8.8, alloy steel, stainless A2-70/A4-80 or the specified grade | Incorrect strength or corrosion assumptions |
| 6 | Finish | Plain, zinc, hot-dip galvanized, black oxide, passivation or named coating | Unexpected corrosion, color or thread allowance |
| 7 | Quantity | Total pieces plus kilograms/cartons if known; split by release if needed | Wrong production lot and loading calculation |
| 8 | Packaging | Bulk carton, small box, pallet, barcode, label language or OEM artwork | Repacking cost and label mistakes |
| 9 | Inspection documents | Material certificate, dimensional report, coating report, batch traceability or third-party inspection | Documents arriving too late for approval |
| 10 | Destination and trade term | Country, port, preferred Incoterm and buyer's forwarder if applicable | Unclear landed-cost comparison |
| 11 | Release schedule | One shipment or staged releases with target dates and stock level | Storage and dispatch expectations that cannot be planned |
| 12 | Drawings or samples | PDF, DWG, DXF, STEP, sample photos or a physical reference part | Assumptions about non-standard geometry |
Use the standard number before the marketing name
Start with the standard and part family, then add grade and finish. For example, “DIN 933 fully threaded hex bolt, M12 × 60, class 8.8, zinc plated” is more actionable than “high-strength zinc bolt.” If two standards are acceptable, name both and require the quotation to identify any difference in dimensions, thread or marking; do not leave the choice hidden inside the supplier's price.
For a first check, compare the relevant DIN 933 fully threaded hex bolt, DIN 931 half-thread hex bolt and GB/T 5782 hexagon head bolt pages. Confirm the final selection against the drawing, thread and application requirements.
Separate stock, custom and document requirements
Tell the supplier which lines are standard stocked items and which lines are custom, non-standard or OEM. This distinction affects sampling, tooling, production sequence, inspection and dispatch planning.
For eligible stocked items, Yuanpai's fastest dispatch process is 96 hours after order, stock and payment confirmation. Custom, non-stock and OEM items use a separately confirmed schedule. Do not treat a 96-hour dispatch target as a universal delivery time.
If the order has a planned release schedule, ask whether it qualifies for up to 180 days of free warehouse storage. Eligibility and release instructions must be confirmed for the specific order.
How to write a mixed-container line list
Use one row per specification, even when several rows will share a container. A practical list can look like this:
| Line | Standard and item | Specification | Qty | Release |
|---|---|---|---|---|
| 1 | DIN 933 hex bolt | M12 × 60, class 8.8, zinc | 5,000 pcs | October |
| 2 | DIN 934 hex nut | M12, class 8, zinc | 5,000 pcs | October |
| 3 | ISO 7089 washer | M12, plain or zinc as confirmed | 5,000 pcs | October |
| 4 | DIN 933 hex bolt | M12 × 80, class 8.8, zinc | 3,000 pcs | December |
This format lets a supplier review compatibility, packing, partial shipment and remaining stock without guessing. Mixed-container and small-batch support remain subject to the confirmed supply plan.
Documents to request before approval
Request only the documents relevant to the product and destination. Depending on the confirmed order, buyers may ask for material certificates, dimensional inspection records, coating or salt-spray reports, batch traceability and an agreed third-party inspection route. The applicable scope should be confirmed before production; a generic certificate list is not a substitute for order-specific records.
For quality terminology and inspection questions, use the fastener FAQ. For a broader supplier review, see Supplier Checks for Fastener Purchasing and Fastener Inventory Planning for Overseas Buyers.
RFQ mistakes that cause avoidable delays
- Using “equivalent to” without naming the required dimensions and grade.
- Combining several sizes under one quantity instead of listing each line.
- Leaving finish, packaging or label language until after production.
- Requesting “fast delivery” without stating a required dispatch or arrival date.
- Calling a custom item “standard” because the head shape looks familiar.
- Requesting a certificate after shipment instead of defining it in the RFQ.
Copy-and-send RFQ template
Destination / Incoterm: [country, port, term]
Item list: [one line per standard and size]
Material / grade: [grade or drawing reference]
Finish: [coating and corrosion requirement]
Quantity: [pieces, kilograms and cartons]
Packaging: [bulk, boxes, labels, barcode, OEM artwork]
Documents: [MTC, inspection, coating or third-party requirements]
Schedule: [sample date, first release, later releases, target stock]
Attachments: [PDF/DWG/DXF/STEP, photos or sample details]
Send the completed list to the Yuanpai sales team. You can also review industry solutions before selecting the relevant product families.
A usable quote starts with a usable specification
Put the same 12 fields in every supplier's RFQ sheet. The returned quotations can then be checked line by line for price, technical scope, documents, packing and release timing. Before approving the quotation, ask the supplier to write down every assumption instead of leaving it in an email thread.