background image

Using enclosed template, mark door as 
illustrated at desired lock height and correct 
backset. 

Mark Center
for 2-1/8" Hole

High Side of
Door Bevel

Mark Center
for 1" Hole

Drill 2-1/8" hole through both sides of the 
door as shown and 1" dia. hole into front 
face of the door. Be certain holes are 
perpendicular.

Bore 1" dia.
Hole Second

Bore 2-1/8"
Hole First

Deadbolt needs to be
extended at all times
during installation.

Insert deadbolt in hole, keeping it 
parallel to face of the door and scribe 
line around face plate. Remove deadbolt 
and chisel out scribed area to depth of 
5/32" or until face is flush with door 
edge. Insert deadbolt and fasten with 
two deadbolt screws (#8-32 x 3/4").

With deadbolt extended, install cylinder 
housing with cylinder in place (but without a 
key in the cylinder) and with the tailpiece in line 
with the tailpiece slot in the deadbolt.

TAILPIECE

1-3/8" Thick Door

1. Measure door thickness.

2. If the tailpiece needs to be 

shortened; grip the tailpiece with 
pliers on both sides of  the score 
mark and twist to break off.

METAL JAMB

404

Strike

Strike Box

Fasten strike with
3/4" long screws.

WOOD JAMB

Long screws next

to door stop

7/32"

7/32"

Mark jamb exactly opposite centerline of latch hole. Bore two 1" dia. Holes 7/32" 
above and below height line to a depth of 1-1/8". Mortise for strike and box strike. 
Install and fasten four screws as illustrated. 

NOTE:

 Drill 1/8" dia. pilot holes for 3/4" long screws, and 5/32" dia. for 3" long screws.

2

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Yale® is a registered trademark of Yale Security Inc., an ASSA ABLOY Group company. Other products' brand names may be trademarks or registered trademarks of their

respective owners and are mentioned for reference purposes only. These materials are protected under U.S. copyright laws. All contents current at time of publication. 

Yale Security Inc. reserves the right to change availability of any item in this catalog, its design, construction, and/or its materials.

Copyright © 2010, 2012, Yale Security Inc., an ASSA ABLOY Group company. 

All rights reserved. Reproduction in whole or in part without the express written permission of Yale Security Inc. is prohibited.

Yale Locks & Hardware is a division of Yale Security Inc., an ASSA ABLOY Group company.

Tailpiece

Double Cylinder 

Tailpiece Configuration

NOTE FOR CYLINDER X CYLINDER VERSIONS: 
All locks are preset for 1-3/4" door thickness. 
For 1-3/8" doors, substitute with shorter tailpieces 
provided in poly bag.

An ASSA ABLOY Group brand

80-YMD1-0130-999 (09-12)

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