M4 x 20 Socket Countersunk Screws A4 Stainless Steel (316) DIN 912

Also known as flat head screws, a hexagon  key (Allen) is required to fit these fasteners , designed for applications when fitted sit flush to receivinmg surface. Stainless Steel A2 (304)

For marine and salt water applications or highly corrosive environments we recommend the use of A4 (316) Stainless Steel instead of  A2 (304) stainless grade.

Product Details

• M4.0 x 0.70mm Pitch

• Coarse Thread

• 2.50mm  Allen Key Size

• Longer lengths are not fully threaded