Board-to-board header, 18 positions at 0.050" pitch
The 20021121-00018T4LF is the 18-position member of Amphenol ICC's Minitek127 1.27 mm header line, unshrouded, dual-row, with all positions loaded.
Pitch and row spacing across the series
The 0.050" (1.27 mm) pitch and 0.050" (1.27 mm) row spacing are shared across the Minitek127 series — the 18-position 20021121-00018T4LF sits alongside other position counts in the same footprint, so the board layout stays consistent when the circuit count changes.