100pc Nylon Plastic Machine Screw PF-640N M6x40x1 M6x40 6×40 Pitch 1mm M6 KSS *
M6x40 pitch=1.0mm. KSS, made in Taiwan. Nylon Plastic Machine Screw. Material : Nylon 66. Net weight approx : 122g, 100pcs. Hope you can understand. For example 3 For example 2 .