Stem #	ID of Tubing	Rubber Range ( smallest size to largest size )
ER9	3/4″	.720″ to .851″
ER27	7/8″	.852″ to .927″ fits 1″ O.D. 16 or 18 Gauge
ER28	1″	.928″ to 1.029″
ER7A	1 1/16″	1.020″ to 1.100″
ER29	1 1/8″	1.100″ to 1.180″
ER17	1 1/4″	1.178″ to 1.303″
ER25	1 3/8″	1.360″ to 1.425″
ER26	1 1/2″	1.426″ to 1.589″ fits 1 5/8″ O.D. 16 or 18 Gauge
ER21	1 13/16″	1.790″ to 1.850″

We have a $20 minimum order which applies to both website and phone in orders.

These hard to find sockets are now available for purchase separately. Sockets may be returned for exchange only, please measure carefully. Sockets shown below fit our casters. They may or may not fit other casters.

The most important thing is to make sure that the stem of the caster will FIT your chair. Click Here for help on measuring your stem correctly.

Plastic Sockets

Grip Neck Stem: 5/16" x 1 1/2"

Inside Diameter of Tubing (ID)

Round Sockets: .433″ Diam.
Square Sockets: .678″ Sq.

Grip Ring Stem: 7/16" x 7/8"

The length of your stem may be shorter but not longer

Inside Diameter of Tubing (ID)

Round Sockets:
- .805″ Diam.
- .870″ Diam.
- .902″ Diam.
- .992″ Diam.
Square Sockets: .678″ Sq.
- .902″ Square
- .916″ Square

Metal Socket for use with a Grip Neck Stem

Grip Neck Stem: 5/16" x 1 1/2"

The length of your stem my be shorter but not longer

Commonly called a “Caster Clip”, this socket is designed to install casters on the edge of 3/4″ Particle Board, MDF or similar sheet goods. Attach caster by drilling a 3/8″ x 1 5/8″ hole. Install socket, then insert caster. You may want to “drill & tack nail” the bottom face or add some silicon sealer to the hole when installing.

Attach caster by drilling a 3/8″ x 1 5/8″ hole. Install socket, then insert caster.

Metal Socket for use with a Grip Ring Stem

Grip Ring Stem: 7/16" x 7/8"

The length of your stem my be shorter but not longer

This socket is used to install casters with a 7/16″ Diameter Grip Ring Stem on WOOD or Steel furniture. The Tack Plate Diameter is approx 1″ and the overall length is 1.46″

To attach in wood, drill a 5/8″ x 1 1/2″ hole. Apply Epoxy Glue** ( Not supplied ) to socket and insert into hole. Allow to harden before inserting caster into socket. ( This socket is not plated and can also be welded to steel.

** Use a 2 part Epoxy available at any Hardware Store.

This socket is used to install casters with a 7/16″ Diameter Grip Ring Stem on WOOD furniture. Attach to inside of frame with wood screws ( Not supplied ). Insert caster into socket.

This socket is used to install casters with a 7/16″ Diameter Grip Ring Stem on WOOD furniture. To attach, drill a 5/8″ x 1 1/2″ hole. Insert socket and attach with 1/4″ wood screws ( Not supplied ). Insert caster into socket.

Socket Chart

Click on the Part Numbers for Pricing, Options and to ORDER.

Stem Type	Plastic Socket Part Numbers	Shape	Material	Tubing Gauge	Tube Inside Diam.	Socket Dim A OD	Socket Dim B	Socket Dim C	Compatible Stem Max Size
Grip Neck Stem	PS-3027 Click here for more information	Round	Plastic/Brown	9/16″ 16 Ga	.433 Rd	0.450	0.935	1.775	5/16″ x 1 1/2″
Grip Neck Stem	PS-2500 Click here for more information	Square	Plastic/White	3/4″ 20 Ga	.678 Sq	0.695	0.765	1.760	5/16″ x 1 1/2″
Grip Ring Stem	PS-2014 Click here for more information	Round	HD Plastic/ Black	7/8″ 20 Ga	.805 Rd	0.832	0.852	1.785	7/16″ x 1 1/2″
	PS-2460 Click here for more information	Round	HD Plastic/ Black	1″ 16 Ga	.870 Rd	0.894	1.250	1.825	7/16″ x 1 1/2″
	PS-2473 Click here for more information	Round	HD Plastic/ Black	1″ 18 Ga	.902 Rd	0.924	1.250	1.825	7/16″ x 1 1/2″
	PS-2498GR Click here for more information	Round	HD Plastic/ Black	1 1/16″ 20 Ga	. 992Rd	1.002	1.250	1.825	7/16″ x 1 1/2″
	PS-2045 Click here for more information	Square	HD Plastic/ Black	1″ 16 Ga	.870 Sq	0.902	0.996	1.785	7/16″ x 1 1/2″
	PS-1640 Click here for more information	Square	Glass/Filled Nylon	1″ 18 Ga	.902 Sq	0.916	1.040	2.325	7/16″ x 1 3/4″

Stem Type	Metal Socket Part Numbers	Material	Tack Plate	Hole Required	Attachment	Compatible Stem
Grip Neck Stem	MS-2719 Click here for more information	Metal	3/4″ Dia.	3/8″ x 1 5/8″	Hammer/Press In	5/16″ x 1 1/2″
Grip Neck Stem	CC34 Click here for more information	Metal	3/4″ Thick	3/8″ x 1 5/8″	Hammer/Press In	5/16″ x 1 1/2″
Grip Ring Stem	MS-2255 Click here for more information	Metal	2 1/8″ Dia.	5/8″ x 1 1/2″	1/4″ Screws Not Inc.	7/16″ x 1 3/8″
	MS-S10X Click here for more information	Metal	1″ Dia.	5/8″ x 1 1/2″	Welded or Epoxy Glue Not included	7/16″ x 1 3/8″
	MB180 Click here for more information	Metal	Straight	None	Screws Not Inc.	7/16″ x 1 1/2″
	MB90 Click here for more information	Metal	Corner	None	Screws Not Inc.	7/16″ x 1 1/2″