Eight lines to connect and your breadboard's getting crowded. The Jaycar HM3408 is an 8-way, 2.54mm-pitch header that bolts the connection into place — literally, with a locking key so it can't go in the wrong way. Square tin-plated brass pins protrude 3.4mm for a solid solder joint on the board. White nylon wafer, 3.3mm thick, UL 94V-0 rated. Stack boards end-to-end or mount at 90° to save space. Rated 0 to +75°C. Eight clean connections, zero guesswork
| brand | Jaycar |
| sku | HM3408 |
| pin_count | 8 |
| pitch | 2.54mm (0.1in) |
| pin_type | Square tin-plated brass crimp pins |
| pin_protrusion | 3.4mm |
| wafer_thickness | 3.3mm |
| housing_material | UL 94V-0 white nylon |
| normal_mating_force | 200g min |
| operating_temperature | 0 to +75°C |
| mounting | Through-hole PCB, soldered |
| polarisation | Yes – locking key on back |
| category | Electronics & Components > Cables & Connectors |