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RC wiring · made for builders

RC Servo Connector
Safety Locks

Keep Your Servo Connections Connected.

A loose servo extension can turn into a serious problem fast. These lightweight connector locks fit around compatible servo connections to help keep the plugs securely joined inside your RC aircraft.

50 Pack one pack = 50 locks

$14.99 per 50-pack · about $0.30 per lock

  • Helps keep servo connectors from pulling apart
  • Designed for RC airplane servo extensions
  • Lightweight polymer locks, black
  • Fits around the joined connection
  • No tape, no heat shrink, no glue
  • 50 locks: enough for several airplanes
  • 50-Piece Pack
  • RC-Specific
  • Made for Builders

A tiny connection shouldn’t be the weak point in your airplane.

Secure your servo extensions before they become a problem.

A locked servo extension inside a yellow foam wing, next to the servo and its pushrod
Why it exists

Don’t Let a Servo Plug Work Loose.

Servo extensions run out through wings and tails where they get handled, pulled and shaken. A plug that creeps apart does not announce itself; the first sign is a control surface that stops answering.

A connector lock fits around the joined pair and holds the two halves together, so the extension stays connected where you cannot see it.

  • Secure the connectionHelps keep servo plugs joined inside the airframe.
  • LightweightA small polymer part. It goes where the extension goes.
  • Easy to useConnect the plugs, fit the lock around the joint, fly.
How it works

Connect. Lock. Fly.

  1. 1
    Connect

    Plug the servo lead into its extension the way you always do, making sure the pins are fully seated.

  2. 2
    Lock

    Fit a lock around the joined pair so it sits over the joint between the two connectors, as in the photo.

  3. 3
    Fly

    Route the extension as normal. The lock holds the halves together where you cannot reach them in flight.

Close-up of a safety lock seated around the joint between two mated servo connectors
Installed: the lock sits around the joint between the two connectors.
The 50-pack

Because One Airplane Can Use More Than You Think.

Count the extension joints on a typical build: one at each aileron servo, often one at each flap, sometimes one or two at the tail. That is several locks per airplane before you keep any spares.

$0.30per lock50 locks for $14.99

Keep a bag at the bench and lock every extension on every build. Stock up once and secure multiple airplanes.

Fifty black servo connector safety locks laid out in rows on white
One lock installed on a joined servo connection and three loose locks beside it
Up close

Simple Part. Important Job.

There is nothing to adjust and nothing to wear out in normal use: a lightweight polymer connector lock shaped to sit around the joint of a mated servo connection.

  • CompactSmall enough to follow an extension through a wing or fuselage.
  • Fits around the jointHolds the two connector halves together where they meet.
  • Open centerThe wires pass straight through; nothing presses on the pins.
  • BlackDisappears against black servo leads and extensions.

Only what has been confirmed is listed. If you need a dimension for a specific connector, ask before you order.

Compatibility

Will It Fit My Servo Connector?

These locks are designed around common RC servo-style connections: the plug-and-socket pairs found on servo leads and servo extensions. No universal fit is claimed, and no connector dimensions are quoted here because they have not been confirmed for every brand.

  • Compare your connectors with the installed close-ups below before ordering.
  • If your connectors have a housing, a latch or an unusual size, ask first.
  • Locks only. Servo leads, extensions and connectors are not included.
What’s included

One 50-Pack

  • 50Connector safety locks
  • —Black

That is the whole pack: 50 locks, nothing else. The servo leads and connectors in the photos show the lock in place and are not included.

Fifty black servo connector safety locks laid out in rows on white
Goes with

Label It. Then Lock It.

Label each servo lead so you know what plugs where, then lock each extension so it stays plugged. The two together are the Wiring Organization Bundle.

Assorted heat-shrink servo lead labels
Servo Lead LabelsStandard 30-Pack · $19.99
Connector safety locks
Connector Safety Locks50-Pack · $14.99
Wiring Organization Bundle

30 labels + 50 locks

$29.99 $34.98 bought separately

Save $4.99 against the two packs on their own

  • One Standard 30-Pack of heat-shrink servo lead labels
  • One 50-pack of connector safety locks

Want custom label text or a bigger label pack? Choose a label pack and add the locks separately.

Common questions

Questions before you order

They fit around the joint where a servo lead plugs into an extension and help keep the two connectors from pulling apart. Servo extensions run out to wing and tail servos, where they can be tugged by handling, vibration and wing removal; the lock holds the joined pair together.
Fifty. One pack is enough to lock every servo extension on several airplanes and still keep spares at the bench.
No. The pack is 50 locks only. The servo leads and connectors in the photos are there to show the lock in place and are not included.
Yes, that is what they are designed around: the servo extensions that run from the receiver out to aileron, flap and tail servos. They are not specific to any one model.
The lock is a mechanical part with no adhesive, so nothing stops you taking one off a connection. How a lock holds up after repeated removal has not been tested, so treat them as a per-connection part and keep spares from the pack.
No universal fit is claimed. They are designed around common RC servo-style connections, the plug-and-socket pairs used on servo leads and extensions. Compare your connectors with the close-up photos on this page before you order, and ask if your connectors have a housing, a latch or an unusual size.
Because one airplane can use more than you think. A typical build has an extension at each aileron servo, often at the flaps, and sometimes at the tail; that is several joints per airplane before counting spares. Fifty covers several builds at a low cost per lock.

Something else? Ask Eric — the answer gets added here if it would help the next builder.