Here are some of the most well-known, leading global suppliers of marine self-tapping screws:

```markdown

Leading Global Suppliers of Marine Self Tapping Screws

1. McMaster-Carr

   • A comprehensive industrial supply company that offers a wide variety of fasteners, including marine self-tapping screws.

2. Bolt Depot

   • Specializes in various fasteners and offers a range of marine-grade self-tapping screws.

3. Fastenal

   • A major supplier of industrial and construction fasteners, including marine self-tappers.

4. Grainger

   • A leading broad line supplier of maintenance, repair, and operating products, featuring a selection of marine fasteners.

5. Hillman Group

   • Supplies a variety of fastener solutions, including marine-grade self-tapping screws.

6. Screws4U

   • An online supplier specializing in marine screws and fasteners, focusing on quality and corrosion resistance.

7. White Cap

   • Provides a range of construction and industrial supplies, including marine self-tapping screws in various materials.

8. Fastening House

   • A supplier specifically catering to marine and industrial fasteners, with a selection of self-tapping screws.

9. Parker Hannifin

   • A supplier of engineered materials that includes a selection of marine-grade screws and fasteners.

10. Orion Metal Products

    • Specializes in custom products and marine hardware, including a variety of fasteners. ```

This list offers a mix of prominent suppliers that cater to the marine sector's needs, emphasizing their reliability and product offerings.