Metal Stamping Supplier Checklist: 40 Questions Before You Place an Order
Choosing a metal stamping supplier without a structured evaluation process is how companies end up with tooling disputes, quality escapes, and missed launches. This checklist gives procurement teams, engineers, and project managers a complete set of questions to ask before committing to a supplier—covering capability, quality, tooling, commercial terms, and risk.
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Use this checklist during supplier audits, RFQ evaluation, or initial supplier qualification. Score each item 1 (not met), 2 (partially met), or 3 (fully met). Total scores below 80/120 warrant a supplier development conversation before placing production orders.
Section 1: Technical Capability (12 Questions)
1. Press range and tonnage
Does the supplier have presses in the correct tonnage range for your parts? Ask for a full press list including tonnage, bed size, stroke, and year of manufacture.
- Minimum: At least one press at 120–150% of your calculated forming force
2. Progressive die capability
Can the supplier design and run multi-station progressive dies? What is the maximum number of stations they have run in a single die?
- Minimum: 12-station progressive die experience for complex connectors/brackets
3. Deep draw capability
If your parts require drawing, does the supplier have blank holders, draw cushions, and the press stroke depth required?
- Required: Hydraulic cushion or nitrogen cylinder blank holder for draw operations
4. Fine blanking availability
If your part requires burr-free, perpendicular cut edges, does the supplier have fine blanking capability?
- Note: Fine blanking requires a specialized 3-force press—not all stamping shops have this
5. Material range and experience
Has the supplier run your specific material grade (e.g., stainless 304, 5052-H32 aluminum, C26000 brass) at your thickness?
- Ask for: Sample parts or Cpk data from a similar material
6. Minimum thickness capability
What is the thinnest material the supplier currently runs in production? For electronics connectors (0.1–0.3mm), not all shops have the feeder precision and die alignment required.
7. Tolerance achievement in production
What is the tightest hole location tolerance currently held in a running progressive die? Get a specific answer with supporting data—not “we can do ±0.01mm” without evidence.
8. In-house toolroom
Does the supplier build and maintain dies in-house? Equipment list should include CNC machining center, wire EDM, sinker EDM, and surface grinder.
- Red flag: All tooling outsourced to subcontractors
9. Secondary operations
Can the supplier perform required secondary operations in-house: tapping, deburring, heat treatment, plating coordination, assembly?
- Reduces logistics complexity and quality risk vs. multiple suppliers
10. Maximum part size
What is the largest part (in plan view and depth) they can stamp? Relevant if your parts are structural (automotive, construction) rather than precision small parts.
11. Production speed
What actual SPM rates are achieved for parts similar to yours? Rated press speed vs. production speed can differ by 3–5×.
12. Automation level
Do they run automated coil feeding, in-die sensing, and vision inspection, or is production heavily manual? Automation reduces operator-dependent variation.
Section 2: Quality Systems (10 Questions)
13. ISO 9001 certification
Is the supplier ISO 9001 certified? By which certifying body? When is the next surveillance audit?
- Baseline requirement for most industrial and commercial parts
14. IATF 16949 certification (automotive)
For automotive parts: Is the supplier IATF 16949 certified? This is non-negotiable for Tier 1/Tier 2 automotive supply.
15. PPAP capability
Can the supplier complete PPAP Level 3 (or your required level)? Ask to see a sample PPAP package from a current automotive customer.
16. APQP / control plan
Does the supplier develop control plans and FMEAs for new programs? Are they available for review?
17. Measurement system analysis (MSA)
Does the supplier perform gauge R&R studies on critical dimensions? Can they provide MSA data for measurement equipment used on your parts?
18. Cpk requirements
Can the supplier demonstrate Cpk ≥ 1.33 (or your specified minimum) for critical dimensions on current production parts?
19. Inspection equipment
What inspection equipment is available and calibrated? Minimum for precision parts: CMM, vision measurement system, surface roughness tester, hardness tester.
20. Nonconformance handling
What is the documented process for handling nonconforming material? How many quality escapes have reached customers in the last 12 months?
21. Corrective action system
How does the supplier handle customer complaints? Can they provide an 8D (8 Disciplines) report from a previous corrective action?
22. Material traceability
Can the supplier trace a production part to the specific material heat/coil, die condition, and press run? This is critical for automotive, medical, and aerospace parts.
Section 3: Tooling (8 Questions)
23. Tooling ownership (written)
Is tooling ownership clearly defined in a written contract? Does the buyer own the tooling upon full payment?
- Non-negotiable: Must be in writing before tooling is cut
24. Tooling storage and maintenance
How are customer-owned dies stored? Is a tooling maintenance schedule documented? What maintenance is performed between runs?
25. Die life expectation
What die life (in strokes) is warranted for your tooling type and material? How are warranty claims handled if die life falls short?
26. Tooling modification ownership
If the die requires modification (DFM change, engineering change), who pays? What is the change management process?
27. Tooling transfer rights
If the buyer decides to move production to another supplier, will the tooling be released? Under what conditions?
28. First article (T1) process
What is included in the first-article package: dimensional report, material cert, process parameters, visual inspection?
29. Die try-out iterations
How many try-out iterations are included in the tooling quote? What is the cost of additional try-out rounds?
30. Tooling lead time commitment
What is the specific milestone schedule from drawing approval to first-article samples? Is this a contractual commitment?
Section 4: Commercial Terms (6 Questions)
31. Tooling payment terms
What are the tooling payment milestones (e.g., 50% down, 50% after FAI)? Is amortization over parts volume available?
32. Part pricing structure
Is the part price fixed for a minimum period, or subject to quarterly revision? How are material price fluctuations handled (pass-through, indexed)?
33. NDA / IP protection
Will the supplier sign an NDA before receiving drawings? Is IP protection explicitly addressed in the supply agreement?
34. Minimum order quantity (MOQ)
What is the MOQ for repeat production orders? Is there a setup charge for small runs below MOQ?
35. Payment terms
What are the standard payment terms (Net 30, Net 60, advance payment percentage)?
36. Quality claim process
What is the supplier’s documented process for handling buyer quality claims? Who approves returns, credits, or replacement shipments?
Section 5: Delivery and Communication (8 Questions)
37. On-time delivery performance
What was the supplier’s OTD (on-time delivery) rate for the last 12 months? Target ≥ 95%.
38. Lead time for repeat orders
Standard production lead time from PO to shipment for repeat orders? (2–4 weeks is typical for most stampings)
39. Rush order capability
Can the supplier handle emergency orders (5–7 business days)? At what premium?
40. Communication responsiveness
How quickly does the supplier respond to RFQs, technical questions, and quality escapes? Who is the engineering point of contact?
- Benchmark: RFQ response within 48 hours; technical questions answered by an engineer within 24 hours
Scoring and Interpretation
| Score | Interpretation |
|---|---|
| 100–120 | Excellent supplier—proceed with production order |
| 85–99 | Good supplier—minor gaps, proceed with monitoring plan |
| 70–84 | Acceptable—address specific gaps before production; development plan required |
| 55–69 | Significant gaps—qualify only for non-critical parts; development required |
| < 55 | Not qualified—do not source production parts until gaps resolved |
Minimum Non-Negotiable Requirements
Regardless of total score, these five items must be fully met before placing any production tooling order:
- Tooling ownership in writing (Question 23) — without this, you have no supply chain security
- ISO 9001 certification (Question 13) — minimum quality system baseline
- In-house toolroom with wire EDM (Question 8) — essential for die control
- PPAP capability if automotive (Question 15) — non-optional for IATF programs
- Cpk ≥ 1.33 demonstrated (Question 18) — process must be capable, not just targeted
A supplier who cannot meet these five items should not receive tooling investment, regardless of price or lead time attractiveness.
Frequently Asked Questions
What is metal stamping supplier?
Metal stamping supplier is a specialized manufacturing process used to create precise metal components. Our team has over 25 years of experience delivering high-quality results for global clients across automotive, aerospace, electronics, and construction industries.
What tolerances can you achieve for metal stamping supplier?
We achieve standard tolerances of ±0.05mm, with precision tolerances down to ±0.02mm for critical applications. All parts are inspected using CMM equipment with Cpk≥1.33 process capability.
What materials do you work with for metal stamping supplier?
We work with a wide range of materials including aluminum (1100-6061), stainless steel (301-430), carbon steel, copper, brass, phosphor bronze, and specialty alloys. Material thickness ranges from 0.1mm to 12mm.
What is your minimum order quantity for metal stamping supplier?
We accept prototype orders starting from 1 piece. For production runs, we recommend starting at 1,000 pieces for cost efficiency, though we accommodate various volumes based on project requirements.
How do I get a quote for metal stamping supplier?
Submit your drawings (DWG, DXF, STEP, IGES, or PDF) via our contact form or email. We provide DFM feedback and pricing within 24 hours. Our engineering team reviews every inquiry for optimal manufacturability.
What quality certifications do you have for metal stamping supplier?
We maintain ISO 9001:2015 and IATF 16949 certifications with full traceability. Every shipment includes inspection reports, material certificates, and compliance documentation as required.