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Total Locking Casters – StemCaster Model K3A

Total Locking StemCaster Model K3A

“If you want help making a selection, call: 800-501-3808”

Threaded Stem/Hollow Kingpin:

Stem #Threaded Stem SizeThreaded Stem Length
TS613/8″ – 161″
TS623/8″ – 161  1/2″
TS221/2″ – 131  1/2″
TS26N1/2″ – 132  3/4″
TSC11/2″ – 134″
TS5/85/8″ – 111  3/4″
TSC25/8″ – 114″
TS3/43/4″ – 101  3/4″
TSC33/4″ – 106″

Expanding Rubber Stem:

Stem #ID of TubingRubber Range ( smallest size to largest size )
ER93/4″.720″ to .851″
ER277/8″.852″ to .927″ fits 1″ O.D. 16 or 18 Gauge
ER281″.928″ to 1.029″
ER7A1  1/16″1.020″ to 1.100″
ER291  1/8″1.100″ to 1.180″
ER171  1/4″1.178″ to 1.303″
ER251  3/8″1.360″ to 1.425″
ER261  1/2″1.426″ to 1.589″ fits 1 5/8″ O.D. 16 or 18 Gauge
ER211  13/16″1.790″ to 1.850″

Square and Round Metal Stems:

Total Locking Brake:

Total Locking StemCaster Model K3A Chart (Click the Part Number to Order)

When you put your mouse over the words in the wheel description column you see a picture of the wheel. Click on the part number in the Swivel and Rigid columns to see the complete caster.

Click below for Replacement Wheels

Total-Lock Brake
Part Number
Swivel Casters
Threaded Stem Only
( without Brake )
Part Number
3″1  1/4″Gray Soft RubberPS150K3ARF3X-MLK3ARF3X1  3/44″
Super Soft Gray Soft RubberB105K3ARS3X-MLK3ARS3X
High Capacity RubberB200K3ARH3X-MLK3ARH3X
Maroon/Gray Premium PolyurethaneB250K3APM3X-MLK3APM3X
Black/Gray PolyurethanePS200K3ABK3X-MLK3ABK3X
Blue/Gray PolyurethanePS200K3ABP3X-MLK3ABP3X
Gray PolyurethanePS200K3AGP3X-MLK3AGP3X
Red/Gray PolyurethanePS200K3ARG3X-MLK3ARG3X
Blue Polyurethane on AluminumB250K3APA3X-MLK3APA3X
Polyolefin – BlackP250K3APB3X-MLK3APB3X
Polyolefin – Black DonutB250K3APB3BX-MLK3APB3BX
Nylon ( White )B250K3ANY3BX-MLK3ANY3BX
4″1  3/8″Blue Soft RubberRB250K3ARC4X-MLK3ARC4X25″
1  1/4″Gray Soft RubberPS200K3ARF4X-MLK3ARF4X
Super Soft Gray Soft RubberB120K3ARS4X-MLK3ARS4X
High Capacity RubberB250K3ARH4X-MLK3ARH4X
Maroon/Gray Premium PolyurethaneB300K3APM4X-MLK3APM4X
Gray PolyurethanePS250K3AGP4X-MLK3AGP4X
Black/Gray PolyurethanePS250K3ABK4X-MLK3ABK4X
Blue/Gray PolyurethanePS250K3ABP4X-MLK3ABP4X
Red/Gray PolyurethanePS250K3ARG4X-MLK3ARG4X
Blue Polyurethane on AluminumB250K3APA4X-MLK3APA4X
Gray Rubber on AluminumB300K3ARA4X-MLK3ARA4X
Polyolefin – BlackP300K3APB4X-MLK3APB4X
Polyolefin – Black DonutB300K3APB4BX-MLK3APB4BX
Nylon ( White )B300K3ANY4BX-MLK3ANY4BX
5″1  1/4″Gray Soft RubberPS250K3ARF5X-MLK3ARF5X2  1/26  1/8″
Super Soft Gray Soft RubberB125K3ARS5X-MLK3ARS5X
High Capacity RubberB250K3ARH5X-MLK3ARH5X
Maroon/Gray Premium PolyurethaneB300K3APM5X-MLK3APM5X
Gray PolyurethanePS250K3AGP5X-MLK3AGP5X
Black/Gray PolyurethanePS250K3ABK5X-MLK3ABK5X
Blue/Gray PolyurethanePS250K3ABP5X-MLK3ABP5X
Red/Gray PolyurethanePS250K3ARG5X-MLK3ARG5X
Blue Polyurethane on AluminumB250K3APA5X-MLK3APA5X
Gray Rubber on AluminumB300K3ARA5X-MLK3ARA5X
Polyolefin – BlackP300K3APB5X-MLK3APB5X
Polyolefin – Black DonutB300K3APB5BX-MLK3APB5BX
Nylon ( White )B300K3ANY5BX-MLK3ANY5BX
6″1  1/4″Gray Soft RubberPS300K3ARFR6X-MLK3ARFR6X37″

We do NOT include mounting Hardware.

T-Nuts for Threaded Stems:

T-Nuts can be used to secure our threaded stem casters to wooden items. Here we show the typical use of the T-Nut for both a Horizontal and a Vertical Application. 

In the Horizontal Application, you would drill a hole equal to the diameter of the barrel of the T-Nut and completely thru your wood. Hammer the T-Nut into the hole and thread your caster in from the bottom. This is the strongest mounting. 

The Vertical Application is for attaching casters to the bottom of legs and into the end grain of the wood. This is not an exceptionally strong way to mount! Drill your hole equal to the diameter of the barrel of the T-Nut and to the depth of the length of the stem of the caster plus about 1/4″. Apply 2 part epoxy to the T-Nut for additional strength. Hammer the T-Nut into the hole and thread your caster in from the bottom. You must use epoxy as we have had problems with some woods where the nuts ( and the casters ) fall off.


The wheels featured with Caster Model K3A are non-marking, and all except Polyolefin can be used on hardwood floors. Polyolefin wheels are best at reducing the risk of a flat spot occuring when loads are left standing for prolong periods. Gray Soft Rubber and Polyurethane wheels have a sealed precision ball bearing. They provide floor and cargo protection, quiet operation, and are very easy rolling. Try a set of 4 casters. You will be amazed at their performance!

Swivel Radius for Casters with the Total-Lock Brake – ALL SIZES – 5″

Use the Polyolefin ( Industrial Plastic ) wheel for “Standing Loads”. Polyolefin wheels eliminate the possiblilty of a flat spot developing if the castered equipment is left parked for a prolong period.

Threaded Stem Casters should NOT be used as a “Leveling Device”! Capacity ratings are based on the weight being directly on the top of the swivel bearing, not somewhere above it on the threaded stem.

Stem Mount

Capacity up to 300 pounds per caster. These institutional casters are ideal for any light duty application where the caster must be totally immobile when the caster brake is applied. Caster Model K3A has a unique brake which locks both the wheel and the swivel bearing at the same time. This “Total-Lock” brake insures that the swivel caster will not turn when the wheel is locked. This combination wheel brake and swivel lock is essential for safety in some applications – such as on worktables, tablesaws, and medical equipment. The Total-Lock brake is desireable whenever a brake is needed because it makes a swivel caster totally immobile. 

Industrial & Heavy Duty Casters | Caster City

Total Locking StemCaster Model K3A with Wheels

Typical Application Use for the Total Locking Stem Caster Model K3A Series:

“You should never select on the basis of load capacity alone. There is no industry standard for load capacity ratings and they may not include a factor for abuse. Our capacity ratings are below what the casters are capable of carrying because most applications have less than perfect conditions. Please refer to the information shown at the bottom of this page. If you have any doubt as to which wheel or caster is the BEST choice for your application contact us for a recommendation.”

Industrial & Heavy Duty Casters | Caster City