What does MSTFAB manufacture?

MSTFAB is the international brand of Guangzhou Maisituo Sheet Metal Manufacturing Co., Ltd. It makes drawing-defined sheet metal parts and empty mechanical enclosure shells for OEM buyers, using laser cutting, CNC bending, welding and mechanical assembly. Surface treatments such as powder coating may be coordinated with external partners depending on the order.

Which materials does MSTFAB work with?

Common options include carbon steel, galvanized steel, stainless steel and aluminum. Grade, thickness, dimensions, critical tolerances, hardware, finish and inspection criteria are specified per project on the approved drawing.

What are the MOQ and lead time for custom sheet metal parts?

There is no single MOQ or lead time that applies to every part. MOQ, price, achievable tolerances, lead time, finishing route and inspection deliverables are confirmed in the project quotation and purchase order after the drawing is reviewed.

Does MSTFAB supply electrical components or certified finished equipment?

No. The normal supply scope is fabricated metalwork and empty mechanical housings. Electrical components, wiring, software, system integration and final equipment certification remain with the buyer unless a written quotation or contract explicitly includes them.

How do I request a quote?

Send STEP, STP, DXF, DWG or PDF files with the drawing revision, material and thickness, quantity, critical dimensions, hardware, finish, inspection needs and delivery destination through the RFQ page at https://mstfab.com/contact/.

Sheet Metal Fabrication Vendor Qualification Checklist | MSTFAB

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⚡ Direct Answer: How to Audit and Qualify a Sheet Metal Fabrication Vendor?

A comprehensive OEM sheet metal vendor qualification audit evaluates 5 operational pillars: 1) Equipment Technology & Machine Redundancy: High-power fiber lasers (≥10kW), multi-axis CNC press brakes with optical angle sensors, robotic welding cells, and automated FIPFG gasket dispensing heads; 2) Certified Quality Management System: Active certification under ISO 9001:2015, IATF 16949 (Automotive), or ISO 13485 (Medical) with calibrated CMM coordinate layout equipment; 3) In-House Surface Finishing & Pre-Treatment: Automated multi-stage zinc phosphating/zirconium wash tunnels and powder coat lines with cross-hatch adhesion testing; 4) Configuration & Revision Control: Formal Engineering Change Order (ECO) protocols and digital quarantine of obsolete CAM files; and 5) Certified Export Packaging: Heavy-duty ISPM-15 plywood crating with custom CNC foam dunnage drop-tested to ISTA 1A standards.

Sheet Metal Vendor Qualification Scorecard

Audit Pillar	Mandatory Verification Criterion	MSTFAB Qualification Standard	Audit Score Weight
1. Machinery & Automation	CNC equipment age <7 years; optical angle control	15kW fiber lasers; TruBend press brakes; robotic TIG/MIG	25%
2. Quality Control Lab	Calibrated CMM, salt spray chamber, coating gauges	Zeiss 3D CMM; ASTM B117 salt fog; cross-hatch testers	25%
3. Surface Finishing	In-house multi-stage wash; DFT control 60–90µm	Continuous conveyor line; automated pre-treatment tunnels	20%
4. Process Repeatability	Demonstrated Cpk ≥ 1.33 on CTQ features	Full statistical process control (SPC) tracking on production	15%
5. Logistics & Packing	ISPM-15 certified crates; drop test verification	Custom foam dunnage; heat-treated plywood crates	15%

Selecting a sheet metal manufacturing partner based solely on the lowest quote without conducting a rigorous vendor qualification audit frequently results in catastrophic project failure. Sub-tier job shops that outsource powder coating, lack coordinate measuring machines, or use worn-out manual press brakes create recurring part non-conformances that cost OEMs tens of thousands of dollars in assembly downtime. MSTFAB welcomes virtual and on-site factory qualification audits.

Drawing Audits, First-Article Review & Quality Systems

During vendor qualification, OEM auditors inspect our drawing revision management systems, verify press brake calibration records, and review our AS9102 First Article Inspection reports. Our clean, organized production floors and dedicated export packaging areas demonstrate our commitment to world-class manufacturing standards.

Qualify MSTFAB as Your Tier-1 Sheet Metal Partner

Request our complete supplier audit package—ISO 9001 certificates, equipment lists, CMM capability studies, and sample FAI reports.

Request Supplier Audit Package

Frequently Asked Questions on Vendor Qualification

Can international OEM buyers conduct virtual live audits of MSTFAB?

Yes. We regularly host live virtual audits over video conference, walking client quality teams through our laser cutting cells, press brakes, CMM inspection room, and powder coating lines in real time.

What quality documentation is shipped with each production batch?

Every shipment includes a Certificate of Conformance (CoC), material mill test certificates (MTC), dimensional inspection logs, and coating thickness test records.