Fastener quotations are rarely comparable as received, because each supplier makes different silent assumptions about grade, tolerance, coating, packing and documentation. Decomposing the price turns three different offers into one decision.
Request a broken-down price
Ask for the price split into: raw material, machining and forming, heat treatment, coating, inspection and documentation, packing, inland transport to port, and any tooling or sample charge. Suppliers who refuse a breakdown often have a reason worth knowing.
Material is usually the largest line and the one most likely to differ silently: a quote for 40Cr and a quote for Q235 look similar until the breakdown names the grade.
The comparison table
Rows = the twelve RFQ data points. Columns = each supplier. Fill in what the quotation actually states, and mark gaps explicitly as "not stated" rather than assuming the best case.
Then add three derived rows: estimated landed cost per piece including freight and duty; total cost including packing structure if one supplier ships bulk and another ships kits; and cost per reuse cycle if the item is reusable and quality differences affect life.
The silent differences that matter most
GRADE AND CLASS: a lower class at a lower price can still be correct if the load allows it. Compare against the requirement, not against the other quotes.
TOLERANCE: a supplier quoting a commercial tolerance at a lower price is not offering the same product as one quoting ±2 mm.
COATING THICKNESS: 12 µm and 60 µm are both "galvanized". Get the number.
CERTIFICATION: 2.1 versus 3.1 versus 3.2 certificates differ in cost and in what they prove.
PACKING STRUCTURE: bulk bag versus BOM-marked kit changes the receiving labour cost, which often exceeds the price difference.
LEAD TIME BASIS: from enquiry or from order confirmation? From approval or from deposit? The same quoted number means different dates.
Deciding
Score each supplier on conformance to the specification first, then on total landed cost, then on lead time reliability and communication. Very few decisions actually turn on the last few percent of unit price; most turn on which supplier will deliver the specified product on the date promised.
Keep the comparison table with the purchase order. When a variation is requested later, the table is the baseline that shows whether the variation is genuinely a change.