Replacement Curtain End Lock | Commercial Rolling Steel Door Hardware | Slat Alignment & Curtain Guidance

Keep your rolling steel door curtain properly aligned with the Cornell 5F20 Rolling Steel Door End Lock, a replacement component designed for compatible Cornell rolling door systems.

End locks are installed at the ends of designated curtain slats to help control lateral movement, maintain slat alignment, and reduce wear as the curtain travels through the side guides.

The Cornell 5F20 is an ideal replacement for worn, damaged, broken, or missing end locks during rolling steel door repair, curtain rebuilding, and routine commercial door maintenance.

Key Features

• Cornell 5F20 replacement end lock

• Designed for compatible Cornell rolling steel doors

• Mounts to the end of compatible curtain slats

• Helps maintain proper curtain alignment

• Helps control side-to-side slat movement

• Keeps curtain slats tracking through the door guides

• Helps reduce unnecessary slat and guide wear

• Commercial and industrial door application

• Ideal for rolling door repairs and curtain rebuilds

• Compact replacement component for professional door technicians

What Does a Rolling Door End Lock Do?

A rolling steel door curtain is made from horizontal interlocking slats.

As the door opens and closes, end locks help keep those slats properly positioned so the curtain travels smoothly through the guides.

Properly functioning end locks help:

• Maintain slat alignment

• Limit unwanted lateral movement

• Keep the curtain tracking properly

• Reduce wear at the ends of the slats

• Reduce contact and abrasion inside the guides

• Promote smooth opening and closing

Cornell specifies end locks on rolling service door curtains to maintain slat alignment and prevent wear.

Product Specifications

Manufacturer: Cornell / CornellCookson
Part Number: 5F20
Product Type: Rolling Steel Door End Lock
Application: Rolling Door Curtain
Function: Slat Alignment / Curtain Guidance
Installation: Attached to Compatible Curtain Slat
Use: Replacement / Repair / Maintenance
Unit of Sale: Each

Common Applications

Ideal for:

• Cornell rolling steel doors

• Rolling service doors

• Commercial roll-up doors

• Warehouse doors

• Loading dock doors

• Manufacturing facilities

• Industrial doors

• Storage facilities

• Commercial overhead doors

• Rolling door curtain repairs

Signs an End Lock May Need Replacement

Inspect the rolling door curtain when you notice:

• Slats shifting from side to side

• Curtain rubbing excessively inside the guides

• Broken or missing end locks

• Bent curtain ends

• Excessive guide wear

• Uneven curtain tracking

• Loose end-lock hardware

• Difficulty opening or closing the rolling door

Replacing damaged end locks can help prevent additional wear to the curtain and guides.

Important Compatibility Note

Rolling door end locks vary according to:

• Door manufacturer

• Door model

• Slat profile

• Curtain type

• Guide configuration

• Door age and production series

Verify the existing Cornell 5F20 part number and curtain/slat configuration before ordering.

What's Included

(1) Cornell 5F20 Rolling Steel Door End Lock

Curtain slats, rivets, guides, bottom bar, wind locks, and other rolling door components are sold separately unless specifically stated otherwise.