Inquiry for one Way M4 & M5 screws as per attached picture. Material: Stainless steel A2 M4x12 200 pcs. M4x16 200 pcs. M4x25 200 pcs. M5x30 200 pcs. Also required captive screws, (see facsimile attached image), socket head cap screws, dia. M6, lengths: 12mm length, 16mm, 20mm. 2000 pcs or minimum quantity.