A tight plastic seal protects the wire from cuts, moisture, and dust to prevent short circuits and weakened connections. Attach your wire with a crimping tool to avoid a damaged barrel and loose connection. Then apply heat to seal the plastic onto the wire from all sides.

These terminals slide into other snap-plug terminals, then pop apart so you can break a connection on the fly for quick maintenance or adjustments to your circuit.

Break and restore your tapped connection without rewiring. Instead of connecting to a bare tap line, these taps lock onto wires with snap-plug terminals on the end. First, insert your main line into the tap (no need to strip the wire first). Next, squeeze the tap with a crimper so it bites through the insulation for a secure connection. Crimp a snap plug (sold separately) onto your tap wire, then pop it in and out of the tap as often as you need.

Our best snap-plug terminals for preventing wire pullout and loose connections. A combination of crimping and heating makes the wire extra rigid and secure. First, squeeze the barrel evenly and tightly onto the wire with a crimping tool so it stays put when tugged, vibrated, or under tension for long periods. When you apply heat, the plastic seals and grips the stranded wire while the enclosed solder melts it into a solid, rigid wire that's even tougher to twist or bend. With a round tab rather than a flat one, these are a space-saving alternative to quick-disconnect terminals.