10.9 Alloy Steel Material, 1mm Thread Pitch, Hex Key Hex Socket Countersunk Flat Head Key Bolts Screws M6 x 20mm., Countersunk bolts is
RS PRO RS PRO M6 x 20mm Hex Socket Cap Screw Plain Stainless
M6x16mm 316 Stainless Steel Countersunk Flat Head Hex Socket Cap
M6 x 20mm (30 PCS) Flat Countersunk Head Socket Cap Screws, 10.9
M6 X 20mm Full Thread Countersunk Flat Head Hex Socket Screw
M3-0.5 x 6mm (Pack of 100) Flat Head Hex Socket Cap Screws Bolts
China Hex Socket Flat Chamfered Head Screws and Fittings for
uxcell M10 x 20mm Metric Hex Socket Countersunk Head Screw Bolts
Uxcell M8 x 40mm Metric Hex Socket Countersunk Flat Head Screw
RPI SHOP Bolt - M6 x 20mm CSK Head Allen Cap Screws, Bright Finish
uxcell M3x6mm 10.9 Carbon Steel Countersunk Head Hex