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Floor Locks for Carts & Platform Trucks

For casters 4, 5, 6 or 8 inPlate 4 x 4-1/2 inKick bar style
Four kick bar floor locks, one for each caster height. Step on the bar and a rubber foot presses down to hold the cart; kick it up to roll again. Buy the lock that matches the wheel diameter on the cart so the foot reaches the floor.

Shop by type

1 type

Wheel = wheel diameter · capacity is per caster.

Floor Locks for Carts & Platform Trucks: buying guide

Kick bar floor locks for carts and platform trucks on 4, 5, 6 or 8 in casters, all with a 4 x 4-1/2 in top plate.

4 to 8 in casters4 x 4-1/2 in plateKick bar release

Floor Lock Size Chart

Match the floor lock to your caster wheel diameter. All models use a standard 4" × 4-1/2" top plate. Heights from Admin product specs (retracted / extended). Use on level floors only, floor locks are not jacks and are not a substitute for parking brakes on inclines.

Part # For caster size Retracted height Extended height Top plate Bolt hole pattern
FLPLS4 4" 4-5/8" 5-7/8" 4" × 4-1/2" 2-5/8"×3-3/8" to 3"×3"
FLPLS5 5" 5-1/2" 6-3/4" 4" × 4-1/2" 2-5/8"×3-3/8" to 3"×3"
FLPLS6 6" 6-1/2" 7-3/4" 4" × 4-1/2" 2-5/8"×3-3/8" to 3"×3"
FLPLS8 8" 8-1/2" 9-3/4" 4" × 4-1/2" 2-5/8"×3-3/8" to 3"×3"
Foot-Pedal Brake Activation Cart & Platform Truck Use Standard Mount Sizes OEM Replacement

Shop Floor Locks

Pick by caster size

Lock For caster wheel Top plate Style
4 in kick bar lock 4 in 4 x 4-1/2 in Kick bar, rubber foot
5 in kick bar lock 5 in 4 x 4-1/2 in Kick bar, rubber foot
6 in kick bar lock 6 in 4 x 4-1/2 in Kick bar, rubber foot
8 in kick bar lock 8 in 4 x 4-1/2 in Kick bar, rubber foot

From product titles and listings [S1]. Retracted and extended heights are in the chart above.

Mounting and use

  1. Height: match the lock to the wheel diameter, not the overall caster height alone; a 6 in lock under 5 in casters may not retract enough.
  2. Position: mount it near the rigid end on the cart center line so the cart cannot pivot around the foot.
  3. Floors: use on level floors. A floor lock is not a parking brake for ramps or dock plates.

Floor truck lock questions

Which floor truck lock fits my cart?

Pick the lock that matches your caster wheel diameter: 4, 5, 6 or 8 in. All four use a 4 x 4-1/2 in top plate.

Does a floor lock replace caster brakes?

It holds the whole frame, so it works with free-swiveling casters, but it is meant for level floors, not inclines.

How do you release a kick bar lock?

Kick the bar up and the rubber foot lifts clear of the floor.

Sources

  • [S1] CasterHQ product fields (rated load, diameter, width, wheel and core material, temperature range, mount) and product descriptions for the items on this page, pulled October 20, 2026.

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