The 387700107: Top termination uses steel screws with a zinc, clear chromate finish, accepting wire from 14 AWG to 22 AWG. The block has 14 wire entries total — two per circuit — allowing daisy-chaining or dual-feed on each position.
The 387700107 is the 7-circuit member of the Beau 38770 series. If the BOM requires a different position count, the series offers the 387700109 at 9 circuits, the 387700112 at 12 circuits, and the 387700114 at 14 circuits — all sharing the same 0.375" (9.53mm) pitch, 15 A / 300 V rating, dual-wall construction, and flange mount. The choice is strictly a circuit-count decision; the footprint length scales with position count, so the panel cutout and wiring plan need to match.