To order the correct replacement operator, you will need to determine your: 

• Window vintage, when the window was manufactured

• Window handing, where the lock is located in the window frame, left or right

• Visible glass width, the dimension of the glass you can see and touch

• Operator arm length, the length of the straight arm that pushes the window open. See below for example measurements. 

You can determine your window’s vintage by locating the Andersen® glass logo on the sash. For assistance, see Identify Glass Type on Andersen® Windows and Patio Doors. Once identified, use the information below to select the correct operator from the Andersen Windows and Doors Parts Store .

Operators by Window Vintage

A-Series & 400 Series Operators

Used on A‑Series and 400 Series casement windows. 

• Window vintage: 1995 to Present

• Window handing: Left or right

• Visible glass width: 19-3/4 inches to 24 inches

• Operator arm length: 12 inches

Additional Information

• The operator handles and operator covers are sold separately

• If your window was manufactured from 1995 to 1998 and you have not replaced your operator after 2008, you will need an adapter plate 

• For more information about the operator, see Operator Adaptor Plate Information

Pictured above: Left-Handed Straight‑Arm Corrosion‑Resistant Operator

Right-Handed Straight-Arm Corrosion-Resistant Operator

Perma‑Shield® Straight‑Arm Operators

Before the most up-to-date iteration of our operator, different operators were used on Perma-Shield® casement windows depending on the window's width and when it was manufactured. 

The operator below was used for standard, C, and wide, CW, casement windows.

• Window vintage: 1974 to 1995

• Window handing: Left or right

• Visible glass width: 19-3/4 inches, C, to 24 inches, CW

• Operator arm length: 9-3/8 inches

Additional information

• A replacement order includes a stone-colored cover and screws

• The operator handles and operator covers are also sold separately

• Replaces operators stamped 7198‑17, 1818‑2, or 7191

Pictured above: Left-Handed C/CW Corrosion‑Resistant Straight‑Arm Operator 

See also: Right-Handed C/CW Corrosion-Resistant Straight-Arm Operator 

The operator below was used for narrow, CR, 400 Series Perma‑Shield® casement windows. 

• Window vintage: 1981 to 1995

• Window handing: Left or right

• Visible glass width: 12-5/8 inches, CR

• Operator arm length: 5-1/2 inches

Additional information

• A replacement order includes a gray nylon shoe

• The handle and optional white cover are sold separately

• Replaces operators stamped 7198‑17, 1818‑2, or 7191

Pictured above: Left-Handed CR Straight Arm Corrosion-Resistant Operator 

See also: Right-Handed CR Straight Arm Corrosion-Resistant Operator 

The operator below was used for narrow, CN, casement windows.

• Window vintage: 1981 to 1995

• Window handing: Left or right

• Visible glass width: 16-1/8 inches, CN

• Operator arm length: 8-3/8 inches

Additional information

• A replacement order includes a stone‑colored cover and screws

• The handle is sold separately

Pictured above: Left-Handed CN Corrosion‑Resistant Straight‑Arm Operator 

See also: Right-Handed CN Corrosion-Resistant Straight-Arm Operator

Primed Casement Straight‑Arm Operator

Used on Andersen® primed casement windows manufactured 1974–1989. 

• Window vintage: 1974 to 1989

• Window handing: Left or right

• Operator arm length: 9-3/8 inches

Additional information

• The handle and operator cover are sold separately

• Replaces earlier Roto‑Gear/Amerock model 7191-2

Pictured above: Left-Handed Stone Straight Arm Operator

See also: Right-Handed Stone Straight Arm Operator 

Silver Satin Straight‑Arm Operator

Used on Andersen® Perma‑Shield® casement windows manufactured between 1966 and 1974. 

• Window vintage: 1966 to 1974

• Window handing: Left or right

• Visible glass widths: 15-3/4 inches

• Operator arm length: 9-3/8 inches

Additional information

• A replacement order includes a black nylon shoe and screws

• The handle is sold separately

Pictured above: Left-Handed Silver Satin Straight‑Arm Operator

See also: Right-Handed Silver Satin Straight-Arm Operator

Long Straight‑Arm Bronze Operator

Used on Andersen® primed casement windows manufactured between 1960 and 1974. 

• Window vintage: 1960 to 1974

• Window handing: Left or right

• Visible glass widths:  20‑1/4 inches, 22 inches, to 22‑3/4 inches

• Operator arm length: 9‑1/2 inches

Additional Features

• A replacement order includes a diamond nylon shoe, handle, and screws

• Replaces Amerock/Detroit operators from 1945 to 1960

Pictured above: Long Left-Handed Straight‑Arm Bronze Operator

See also: Long Right-Handed Straight-Arm Bronze Operator

We recommend you replace the channel when you replace the operator. The channel is the metal groove attached to the window that the operator glides along to open the window. 

Short Straight‑Arm Bronze Operator

This operator is similar to the long straight-arm bronze operator but used for narrower Andersen® primed casement windows.

• Window vintage: 1960 to 1974

• Window handing: Left or right

• Visible glass width: 15-3/4 inches

• Operator arm length: 7-1/2 inches

Additional information

• A replacement order includes a nylon shoe, handle, and screws

• Replaces Amerock/Detroit discontinued operators from 1936 to 1960

Pictured above: Left-Handed Short Straight‑Arm Bronze Operator

Right-Handed Short Straight‑Arm Bronze Operator

We recommend you replace the channel when you replace the operator. The channel is the metal groove attached to the window that the operator glides along to open the window. 

Installation

For detailed assistance, see How to Install an A-Series and 400 Series Casement Straight-Arm Operator.

© 2026 Andersen Corporation. All rights reserved.