It uses a 0.100" (2.54 mm) pitch on both rows and contacts, with a right-angle through-hole termination for perpendicular board mounting. All 28 positions are loaded with square male pins in phosphor bronze, finished in tin on both the mating surface and the solder tails — a signal-level interconnect rated 5 A per circuit at 110 V.
The 28 positions of the 86840-428HLF sit above the 10-position and 20-position members of the same BERGSTIK® II unshrouded header family, all sharing the same 0.100" pitch and right-angle through-hole footprint.