
Stainless Steel Hex Countersink Screws with Flat Allen & Undercut Metric System Plain Surface Treatment. OEM/ODM Customization: Flexible customization for non-standard products based on drawings or samples. Free Sample Available: Free samples provided; buyer covers shipping costs for evaluation. Strict Quality Control: Advanced testing including chemical, tensile, hardness, and salt spray tests. Multiple Material Options: Available in Stainless Steel 304 and 316 with grades A2-70 and A4-70. Fast Delivery for Stock: Ship within 3 days after QC if bulk goods are in stock. Wide Size Range: Sizes available from M3 to M20 to meet various application needs. Professional Experience: Over 15 years of fastener OEM service experience and technology development. Flexible Payment Terms: Accept T/T and L/C; 30% deposit with 70% balance before shipment.