Anti-corrosion protection: zinc electroplated coating. You will get answer in 30 minutes. If You don't live in Great Britain.
eBay
1/5pcs 304 A2 Stainless Steel Thread Adapter Male to Male M3 M4 M5 M6 M8 M10 M12 M14 M16 to M20 Double Head Transfer Screw Bolt
Aliexpress UK
Size: M6 12 M6 16 M6 20/25/30/35/40/45/50/55/60. 10pcs M6 Motorcycle Fairing Body Engine Bolt Outer HeX 304 Stainless Steel Screw Nut Colored-Plating Motorcycles Accessories. 10 M6 Motorcycle Body Bolt.
eBay
Yaruijia Titanium Bolt M5/M6/M8x8/10/12/15/16/18/20/25/30/35mm Half Round Head Allen Head Screws for Road Bike Parts
Aliexpress UK
These washers distribute the load of bolts and nuts. Spring Washers Flat Washers.
eBay
ZONSANTA M1.6 M2 M2.5 M3 M4 M5 M6 Mini Micro Small 304 Stainless Steel Cross Phillips Flat Bolt Countersunk Head Furniture Screw
Aliexpress UK
.M6 x 25mm Carriage bolts & nuts BZP. Drive style - Spanner / socket size.10mm. Pallet Trader. Bright zinc plated steel. An exterior structural screw which is suitable for timber and other softwood applications.
eBay
1pc M3 M4 M5 M6 M8 M10 GB835 304 Stainless Steel Knurl Flat Round Head Hand Tighten Curtain Wall Glass Thumb Screw Bolt DIN653
Aliexpress UK
Genuine Shimano Disc Brake Caliper Mounting Bolt. M6 with Built in Washer. IS mount bolts and Caliper mount bolts/washers listed.
eBay
M3 M4 M5 M6 M8 M10 Zinc Plated Carbon Steel Sheep Eye Screw Closed Hook With Ring Screw Lifting Ring Sheep Horn Eye Bolt
Aliexpress UK
HEX HEAD PART THREADED BOLTS GRADE 8.8 ZINC. High Tensile Grade 8.8 Zinc Part Threaded Hex Bolt, DIN 931. All bolts are Part threaded. This will then be avoided.
eBay
20/10sets M3 M4 M5 M6 Gb818 304 Stainless Steel Cross Recessed Pan Head Screws Phillips Screws Bolts With Nut Washer
Aliexpress UK
Countersunk Socket Head Screws feature a countersunk head type, which essentially allows them to sit flush. The socket head of these screws, makes them ideal to use alongside Hex Drive Bits or Allen Key and Wrenches in particular.
eBay
M2 M3 M4 M5 M6 M8 M10 M12 M14 M16 M18 M20 DIN975 A2 304 Stainless Steel Full Thread Bar Bolt Wire Threaded Rod Stud Tooth Stick
Aliexpress UK
For Hexagon Nuts and Bolt Heads. M6 Size - 10mm Wrench Size. M6 - 10mm Wrench Size. M4 - 7mm Wrench Size. M5 - 8mm Wrench Size. M8 - 13mm Wrench Size. M10 - 17mm Wrench Size. M12 - 19mm Wrench Size.
eBay
TitaniumM5/M6/10/15/20/25/30/35/40/50/55/60/80/90/95/100/110/120/130MM round torx head Titanium bolts in stock (one lot=10pcs)
Aliexpress UK