Board-to-board header, 58 positions, 0.100" pitch
The Amphenol FCI 86503-458HLF is a 58-position dual-row board-to-board header from the BERGSTIK II series, on 0.100" (2.54 mm) pitch with matching 0.100" row spacing. The unshrouded push-pull body with 0.100" insulation height and UL94 V-0 black nylon housing suits card-edge and mezzanine layouts inside enclosed equipment.
The 0.100" (2.54 mm) pitch and row spacing are the industry-standard footprint for a dual-row pin header — the board layout matches any 58-position through-hole pattern at that pitch, with 0.120" (3.05 mm) post length for the solder side. Tin on the mating surface limits the connector to around 50 mating cycles before fretting becomes a concern — fine for a one-time board assembly or periodic rework, not for frequent field reconnection.