#4-24 x 3/8 Inch Plain 18-8 (A2) Stainless Steel Pan Head Type-A Self-Tapping Sheet Metal Screw Best Seller They are made up of

They are made up of a male and female part each with specific threading and sealing surfaces

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#4-24 x 3/8 Inch Plain 18-8 (A2) Stainless Steel Pan Head Type-A Self-Tapping Sheet Metal Screw Best Seller They are made up ofPan head design is slightly rounded with minimal vertical sides. Square drive is designed to reduce the risk of stripping and allow single handed installation. Additionally reduces the ability to tamper with the fastener once installed.