M4 x 0.7mm Pitch. Manufactured from solid brass, not brass plated. All screws are fully threaded.
eBay
NINDEJIN 5-20pcs M2 M2.5 M3 M4 M5 M6 Hexagon Socket Head Cap Captive Screws Stainless Steel Reduced Shank Captive Panel Screws
Aliexpress UK
Solid brass slotted wood screw #6 x 2 inch (3.5 x 50 mm) countersunk pack of 20
eBay
304 Stainless Steel M3 M4 M5 M6 M8 Truss Head Hex Socket Self Tapping Screws Button Allen Head Tapping Wooden Screws
Aliexpress UK
vintage Nettlefolds brass wood screws, size 8 x 1 1/4 inch, slotted countersunk head. The price is for 25 screws.
eBay
M14 Car Sealing Gasket Aluminum Screw Washer Auto Engine Bottom Oil Drain Screw Sealing Gasket Accessories for Honda 94109-14000
Aliexpress UK
Size 10 x 3" Brass Woodscrews.
eBay
10/100Pcs Screw Hook Cup Multifunctional Ceiling Hooks Heavy Duty Wall Mount Plastic Dipping Iron Screw-in Hanger Plant Hooks
Aliexpress UK
These are a DIN 551. These have been precision manufactured in-house at GWR Fasteners Limited from whole round brass bar, these are not brass plated. Further details are as follows Slotted Grub Screws.
eBay
Flat Head Cross Tapping Screw Cutting Tail for Plastic M1.4 M2 M3 M3.5 M4 Stainless Steel Phillips Self Tapping Screws Flat Tail
Aliexpress UK
BA Brass Roundhead Screws. BA Steel Roundhead Screws. Available here are BA Slotted Cheese Head Screws which have been manufactured from brass. Further information as follows Zinc Plated BZP. BA Brass Hexagon Bolts.
eBay
Motor Face Screws Aluminum Alloy Protective Cover Screw 12 Pcs For Xiaomi M365/Pro/pro2/1S Electric Scooter Engine Parts
Aliexpress UK
Solid Brass Slotted Countersunk Machine Screws. These solid brass slotted countersunk head machine screws are perfect for a wide range of applications. Head Shape: Countersunk Head. The countersunk head design ensures a flush finish, making these screws ideal for use in projects where appearance is important.
eBay
Phillips Recessed Truss Head Self-tapping Screw 304 Stainless Steel Round Head Truss Mushroom Screws Furniture M3 M3.5 M4 M5M6
Aliexpress UK
Brass Slotted Countersunk Head Wood Screws + Free Cup Washers, you will get free Brass cup washers with each screw quantity ordered which enables the screw to fit flush into the recessed head, providing a neat finish without the need to countersink the material.
eBay
90340-08002-00 Straight Screw Plug Kit For Yamaha Outboard Engine F9.9 to 300HP Magnetic And Non-magnetic Screw
Aliexpress UK