DIN7991 Flat-Head Internal Hexagonal DIN912 Hex Socket Cap Head Bolt Baut Security Screws L Key Boltfor Heavy-Duty Applications

DIN7991 Flat-Head Internal Hexagonal DIN912 Hex Socket Cap Head Bolt Baut Security Screws L Key Boltfor Heavy-Duty Applications. Multiple Steel Grades: Available in DIN Gr.4.6-12.9 and SAE Gr.2-8 for diverse strength needs. Customizable Finishes: Options include Black, Phosphated, Zinc, and Blue-white coatings. OEM and ODM Services: Professional manufacturer accepts custom designs and specifications. Free Standard Samples: Free samples available for standard fasteners to test quality. Strict Quality Control: Professional QC team inspects every item from production to packaging. Advanced Production Process: Cold forging, hot forging, and CNC machining for M2-M100 sizes. Comprehensive Testing: In-house lab performs chemical analysis, corrosion testing, and calibration. Fast Delivery Options: Lead time 30-60 days; off-peak season delivery within 15 workdays.