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Best 8K37R4ESTK-690

Special Order Heavy Duty Interchangeable Core Classroom Door Knob

Quick Product Details

  • Knob Set
  • Heavy Duty
  • Classroom Function
  • 690-Dark Bronze Coated
  • E Rose 3-3/8" concave - Special Trim for 2 3/8" to 3" Thick Doors
Price: $389.00 /each
Special Order non-stock item Requires 6 week lead time

SKU: 8K37R4ESTK-690

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This Best 8K37R4ESTK standard duty, classroom function lock can only be locked or unlocked using a key in the outside lever. The inside lever remains unlocked and free for immediate egress at all times. .

Because this is not a stock item we must order it specifically for you and we will be unable to accept a return unless the item is defective as determined by the factory it was bought from.

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Price: $389.00

Choose Finish:

690 (Dark Bronze Painted) 690 (Dark Bronze Painted)


Special order non stock item with 4 week lead time
Quality and safety:
  • UL Listed for 3-hour A label single swinging (4' x 8' ) fire doors
  • Listed ANSI A156.2, Grade 1

Available Options: Choose Options Above

Product at A Glance

  • Accepts Best 7-pin interchangeable cores, core is not included
  • Through-bolt mounting studs increase torque resistance
Door Thickness 1-3/8" to 2"
Latch - 1/2" throw deadlocking latch
- front: 2-1/4" x 1-1/8"
Strike S3 ANSI strike 4-7/8" x 1-1/4" with curved lip and box (ANSI a115.2 for 1-3/4" doors)
Style Interchangeable Core Door Knob
Grade Heavy duty Grade 1
Function Classroom Function;
- Can be locked/unlocked only by rotating the key in the outside lever
- Inside lever is always free
Backset 2-3/4"
Handing Non-handed

More Info

An interchangeable core has many advantages over a any other keying system. Interchangeable cores provide for flexibility to easily and quickly exchange the core of  your lock without taking the lock apart. This can be very useful if a key is misplaced or if someone unauthorized got hold of your key and can gain access to the wrong places. Interchangeable cores are great protection.



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