The fastest request for quotation is not always the longest. It is the one that separates what is already controlled from what the supplier still needs to review. A buyer can start with a drawing, a bill of materials (BOM) or a short requirement, but the RFQ should make uncertainty visible instead of hiding it inside a part name.
This guide uses a decision-ready structure for special alloy and drawing-based fasteners. It does not turn an early enquiry into a production approval: the agreed drawing, referenced standards and purchase documents remain controlling.
Start with your drawing, or a written part description and the material, approximate sizes, quantity and delivery needs you know. Mark unknown details “to be reviewed”. With a drawing attached, there is no need to copy every dimension into a form.
What makes an RFQ decision-ready?
A decision-ready RFQ lets the supplier answer three questions: what must be manufactured, what evidence must accompany it, and which items are still open for quotation-stage review.
| Requirement | Why it changes the quotation | A useful starting point |
|---|---|---|
| Controlled definition | Prevents an obsolete revision or informal sketch from becoming the manufacturing basis. | Latest drawing, model or referenced dimensional standard with revision status. |
| Product and thread | Changes tooling, raw-material size, inspection method and mating compatibility. | Fastener type, nominal diameter, pitch or threads per inch (TPI), thread series/class and engagement details. |
| Material and condition | The same alloy name can cover different product forms and heat-treatment conditions. | Grade/UNS, material specification, product form and required delivery or heat-treatment condition. |
| Quantity and delivery | Affects route selection, material allocation, packaging and scheduling. | Quantity by line item, destination and required date or project window. |
| Inspection and documents | Sampling, testing, witness points and reporting can change cost and lead time. | Required characteristics, acceptance basis, coverage and document type. |
If you have a drawing, confirm its revision
Send the latest controlled file and state its revision. If a drawing, purchase specification and referenced standard could conflict, define the order of precedence. ISO 10209 describes technical product documentation as the means of conveying a design definition or specification, which is why a filename alone is a weak control [1].
For a preliminary enquiry, mark dimensions that are fixed and those that may be reviewed. A supplier can often propose a manufacturable route, but should not silently choose a tolerance, thread runout or under-head geometry that affects function.
Define geometry and thread as separate decisions
“M12 bolt” or “1/2-inch stud” does not identify the complete part. State the head or drive form, length measurement points, shank configuration, thread at each end, unthreaded portions, points, chamfers and any controlled radii. Sections and detailed views are useful when one view cannot show the feature unambiguously; ISO 128-3 provides the general documentation context for views and sections [2].
If the part is drawing-based, use the custom fastener enquiry route. For standard forms, start with the relevant product page, such as hex head bolts or studs and threaded rods, then identify deviations rather than assuming the product name communicates them.
For a U-bolt, label the width and height measurement bases as well as the thread. The U-bolt dimension guide works through inside width, leg-centre distance and usable thread.
Treat material, condition and finished-part requirements separately
A material trade name is not a complete finished-fastener specification. State the grade or UNS designation, the applicable material specification and product form, and the required condition. Then state any finished-part mechanical, dimensional or surface requirements separately. Raw material compliance does not by itself prove that machining, threading, heat treatment and final inspection meet the finished-part requirement.
A useful RFQ does not ask one reference to do four jobs. Keep dimensional requirements, material specification, finished-part acceptance and inspection documentation distinct.
Write the evidence package before the order
Every BYBOLT delivery includes an MTC / EN 10204 3.1 certificate, heat-number traceability and mechanical testing. Threaded products include sampled GO / NO-GO gauging. Test methods and acceptance criteria follow the agreed specification; PMI, third-party inspection and additional records are agreed separately.
“Certificate required” is too vague. Match the included records to the material or finished parts and characteristics they must represent. Define any additional chemical or dimensional records, positive material identification (PMI), non-destructive testing (NDT) or third-party witness scope before quotation. Agree the sampling or coverage, acceptance basis and report format. The MTC, PMI and inspection guide explains what each evidence type can and cannot prove.
Add commercial constraints that affect the technical route
Quantity, packaging, marking, destination and the required delivery window belong in the same RFQ because they affect manufacturing and inspection planning. Ask for a quotation against a required date; do not turn an unreviewed target into a guaranteed lead-time statement. If alternatives are acceptable, say which variables may change and which may not.
For price comparisons, confirm the delivery term and named place, and ask which freight or other transport charges each price includes.
Compare the scope before comparing the total
Two prices against the same part name can include different work. Put each quotation beside the controlled RFQ and identify exclusions or proposed changes before selecting a supplier. The hypothetical quotation phrases below show what to clarify for an A-286 or 718 fastener enquiry. They do not describe actual quotations.
| Quotation wording | What to resolve |
|---|---|
| “Aged material included” | Does the offer cover the required condition and acceptance of the finished fasteners, or describe only the starting stock? Ask which manufacturing and heat-treatment steps, and which required final tests, the offer includes. |
| “Complete set” | List the number and specification of bolts or studs, nuts, washers and other components. Check that both offers include the same mating hardware. |
| “Certificate included” | Check whether the records cover the starting material or the finished-fastener lot, with the agreed sampling, acceptance and traceability. Confirm that the included delivery records and agreed extra testing or witness points are all listed. |
| “Quoted lead time” | Identify the starting event, dispatch or arrival basis, destination and any approval or material-release dependencies. A quoted schedule is meaningful only with its stated conditions. |
Ask the supplier to resolve each difference explicitly. Record the accepted change and who approved it in the quotation and purchase documents; an unexplained lower price is not proof that the same requirement will be met. For condition-specific questions, use the A-286 heat-treatment guide or 718 finished-fastener specification guide.
Five questions a buyer should expect back
- Which drawing or standard revision controls if references conflict?
- Is the stated alloy condition required at raw-material receipt or on the finished fastener?
- Which dimensions and characteristics are critical to function or assembly?
- What inspection coverage and document package must be included in the quotation?
- May the supplier propose manufacturing, tolerance or material-condition alternatives for review?
RFQ checklist you can send today
- Attach the latest drawing, model, BOM or clear product description.
- State product type, dimensions, thread system and applicable revision.
- Identify alloy grade, material specification, product form and condition.
- List quantity by item and the required destination or delivery window.
- Define critical characteristics, inspection scope and required documents.
- Flag every open item and whether alternatives may be proposed.
You do not need every answer before contacting a supplier. Send the controlled information you have through the BYBOLT RFQ page; unresolved details can then be reviewed explicitly instead of being guessed.
Hex bolt RFQ example and template
Use the existing BYBOLT RFQ / BOM workbook for several items, or copy the outline below. A drawing can replace repeated dimension entries; mark open points “to be reviewed”.
Download the RFQ / BOM Excel template
- Product: Hex bolt; head pattern or drawing reference
- Drawing: [Drawing number and revision, or attach the drawing]
- Material: [Alloy / UNS, specification and required condition]
- Dimensions: [Thread diameter; under-head length L; specified head dimensions]
- Thread: [Metric / UNC / UNF; pitch or TPI; class; full thread or threaded length b]
- Quantity: [Quantity for each size]
- Additional requirements: [PMI, third-party scope, special records or acceptance requirements]
- Delivery: [Destination and target date; state dispatch or arrival]
These are enquiry fields, not confirmed stock sizes or production requirements. Send the information you have; remaining points can be clarified before quotation.