The Amphenol ICC BERGSTIK II 86503-134HLF is a 34-position dual-row 0.100-inch pitch unshrouded male header designed for board-to-board stacking. All 34 circuits are loaded, with square pins sized for push-pull mating into the matching BERGSTIK II receptacle — no locking clip, no screw, just the interference fit holding the pair together in the stack. Contact material is phosphor bronze with either gold or Gold GXT plating at 30.0µin (0.76µm) on the mating interface, rated 5 A per circuit at up to 110 V. The UL94 V-0 flammability rating on the housing means it can sit inside equipment enclosures without triggering a re-design on the thermal layer.
Pin length is short — 0.120 inch post reach and 0.250 inch engagement depth — which is fine for right-angle daughter-card entry or flat mezzanine stacking where the board gap is tight. The 0.100-inch insulation height matches the row spacing, so the header seats flush to the board surface with no standoff to worry about in the footprint. At 34 positions across two rows, this is a mid-density signal header — large enough to carry a parallel bus or multi-signal harness trunk, but unshrouded, so the board designer needs to account for mis-mate risk during assembly. The push-pull fastening is not keyed; if orientation matters in the stack, add a polarizing pin or pick a keyed variant from the same 86503 base number range.
The 86503-134HLF carries an Active lifecycle status — standard production, quoted to BOM quantity against an RFQ. No official successor or cross-reference appears in the listing, so for substitute sourcing the field engineer should check the full BERGSTIK II 86503 position-count ladder to find the nearest peer with a matching pitch, row spacing, and pin geometry.