Twist-on wire cap, 6-20 AWG range
The 2299512-1 is the 6-20 AWG member of TE's twist-on wire cap family, fully insulated with a red shell and twist-on termination. Rated for 6-20 AWG wire, the cap accepts a wire count that varies by wire size — the larger the gauge, the fewer conductors fit inside the shell.
Color-coded by wire range across the series
Within the 229951x series the 2299512-1 (red, 6-20 AWG) sits between the 2299510-1 (tan, 8-22 AWG) and the 2299513-1 (yellow, 10-22 AWG) — the twist-on cap body and insulation are shared, so match the color to the wire range. The green 2299511-1 covers 10-14 AWG, a narrower span than the red cap.