M.2 Connectors Amphenol Commercial M.2 Connectors feature a form factor that is ideal for mobile add-in cards. The connectors are a natural transition from the mini-card and half-mini card to a smaller form factor both in size and volume. These connectors have 75 positions (67 active lines with 8 positions dedicated to mechanical keying). Single- and dual-mechanical keying allows for multiple standards. The M.2 series features two rows of contacts at 0.50mm pitch, with the bottom row staggered 0.25mm from the top row. Amphenol Commercial M.2 Connectors support multiple standard card widths (12mm, 16mm, 22mm, and 30mm) and lengths (16mm, 26mm, 30mm, 38mm, 42mm, 60mm, 80mm, and 110mm).