Stem Casters

These stem casters mount through a hole or socket instead of a bolt-on plate. Use them on chair legs, table bases, light carts, medical stands, and fixtures where there is no room for a top plate. Casters in this collection range from about 80 to 1,400 lb per caster. Mount with a threaded stem, grip-ring stem, expanding rubber stem for round and square tubing, or a square stem. Wheels in this category range from about 2 up to 8 in diameter. Most 3 to 5 in furniture and cart stems run in the 200 to 350 lb band. Soft rubber or TPR is the better pick when the floor has chips or grit. Choose swivel casters when the load must turn in place, and add a brake when it needs to stay put. Capacities below are per caster unless a listing says set. Threaded-only shortlist: threaded stem casters. Plate mounts: cart casters. Chair stems: chair casters.

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3 types

Match the stem: type, diameter, thread and length. How to measure a stem →

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Stem Casters: buying guide

Stem casters that mount through one hole or socket: expanding adapters for tube legs, 1/2-13 and 3/8-16 threaded stems and 7/16 grip ring stems, mostly 3 to 5 in and rated 200 to 350 lb.

Expanding, threaded, grip ring2 to 8 in wheels80 to 1,400 lb eachBrake options

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Expanding Adapter Stem

Engineering Guides

Stem types

Stem	Sizes listed	Fits
Expanding rubber adapter	Tube inside diameters from 3/4 to 1-7/8 in, round and square	Hollow round or square tube legs
Threaded	1/2-13 x 7/8 to 2-1/2 in; 3/8-16 x 1 to 1-1/2 in	Tapped holes, threaded sockets, tee nuts and nuts
Grip ring	7/16 x 7/8 and 7/16 x 1-3/8 in; 13/16 x 2 in	Plastic or metal grip ring sockets
Square stem	P&H 20 Series, .845 in square	Matching square sockets

Product titles and fields [S1].

Wheels and ratings

3 to 5 in, 1-1/4 in tread: the bulk of the page. Colson Performa rubber and HI-TECH polyurethane, CasterHQ TPR and polyurethane, rated 200 to 350 lb.
2 in: light furniture and fixture casters from 80 lb.
6 and 8 in P&H 40 Series: 350 to 1,400 lb.
Brakes: side lock, top lock and total lock options.

How to measure

Expanding stem: measure the inside of the tube, not the outside. Each expanding adapter is listed for a narrow tube range, such as 1-1/8 to 1-3/16 in.
Threaded stem: measure across the threads and count threads per inch. 1/2-13 and 3/8-16 are the common sizes. Measure the length from the swivel to the tip.
Grip ring stem: measure the stem diameter and length. 7/16 x 1-3/8 in is the usual size for carts and furniture.

By stem size: 1/2 in threaded stem casters, 3/8 in threaded stem casters and threaded stem casters. Sockets: tee nuts and sockets.

Stem caster questions

What stem types are available?

Expanding rubber adapter stems, 1/2-13 and 3/8-16 threaded stems, 7/16 in grip ring stems and P&H square stems.

How do I size an expanding stem?

Measure the inside diameter of the tube. Each adapter fits only its listed range.

How much weight can stem casters hold?

Most 3 to 5 in models are rated 200 to 350 lb each. 2 in models start at 80 lb, and P&H 6 and 8 in 40 Series casters reach 1,400 lb.

Do stem casters come with brakes?

Yes. Side lock, top lock and total lock versions are listed.

Jordan Wilson, CasterHQ · reviewed October 20, 2026 · 844-439-4335 · info@casterhq.com

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.

BHP: 1-3/4″ × 2-7/8″, slotted to 3″

BHP: 1-3/4″ × 2-15/16″ slotted to 2-3/8″ × 3-3/8″

BHP: 2-5/8” X 3-5/8” (Slotted to 3” x 3”)

BHP: 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4"

(3″ Wide Casters), Industry-Standard

BHP: 3-3/8" x 5-1/4" slotted to 4-1/8" x 6-1/8"

BHP: 4-1/8" x 6" slotted to 4-1/2" x 6-1/8"

View All • 21 Plate Sizes

Plate Casters

Stem Casters

Stainless Casters

Ergonomic Casters

Leveling Casters

Stem Casters

Shop by stem type

Stem Casters: buying guide

Shop Stem Casters by Mount Type

Stem types

Wheels and ratings

How to measure

Stem caster questions

Sources