https://www.ustoolandfastener.com/grk-pheinox-rss-stainless-steel-5-16-x-4-45-pcs-62225/
GRK PHEINOX RSS Stainless Steel 5/16" x 4" (45 pcs) (62225)
GRK PHEINOX RSS Stainless Steel 5/16" x 4" (45 pcs) (62225)
stainless steel
https://cyfasteners.com/product/pheinox-305-stainless-steel-rt-composite-exterior-trim-screws-9-x-2-1-2/
Pheinox 305 Stainless Steel RT Composite Exterior Trim Screws #9 x 2-1/2" - CY Fasteners