Installation Sheet
Table Of Contents
SALSBURY INDUSTRIES 
1010 East 62
nd
 Street, Los Angeles, CA 90001-1598 
Phone: 1-800-624-5269  Int’l Phone: 323-846-6700 
Fax: 1-800-624-5299  Int’l Fax: 323-846-6800 
 www.mailboxes.com  engineering
@mailboxes.com 
 Copyright © 2016 Salsbury Industries. All rights reserved. (Rev. 04, 5/3/16) 
Arrow Lock Guard – 3500 Series 
Installation Instructions 
IMPORTANT ! 
After installing the mailboxes, contact your local postmaster – the 
USPS will provide and install its own master lock on your mailbox 
unit. Hardware for installing the master lock is included in the 
plastic bag. Please provide the hardware and these instructions to 
the USPS representative when they arrive to install the lock.  
INSTRUCTIONS FOR THE USPS REPRESENTATIVE: 
1.)   Unlock and open the door marked ‘U.S. MAIL’, and pull the 
top frame forward, exposing all of the mailboxes. 
2.)  Remove the Key from the Arrow Lock so the lock’s bolt is 
extended. 
3.)   Rest the Arrow Lock on the pre-installed Lock Bracket  
BOTTOM TAB with the bolt facing up and the keyway 
facing outward (see sketch at right and Photo #3). 
4.)  Insert the key through the large hole in the Lock Bracket 
and into the Arrow Lock, and then turn the key so the bolt 
retracts. Now push the lock into place under the Top Tab of 
the Lock Bracket (see Photo #4).  
5.)   Insert the two long screws through the Lock Bracket holes 
and through the holes in the Arrow Lock (see sketch). Do 
not attach the nuts yet. 
6.)   Place the Lock Guard (Photo #6) over the Arrow Lock so 
the long screws are through its holes, and the Lock Guard 
rests on TOP of the frame (as shown in sketch). 
7.)   Attach the Lock Nuts to the long screws and tighten using 
a Phillips screwdriver and an open-end or socket wrench. 
8.)   Screw the short Self-tapping Screws through the Lock 
Guard and the holes in the frame. 
9.)   Push the frame closed. 
10.)   Turn and remove the Arrow Lock Key, locking the unit. 
Close and lock the ‘U.S. MAIL’ door.  
BOTTOM 
TAB 
Step 3
LOCK 
GUARD
LOCK 
BRACKET 
Step 3
FRAME
Long 
Screws 
Step 5
Step 6
Short 
Screws 
Step 8
LARGE 
HOLE in 
LOCK 
BRACKET 
Step 4
BOTTOM 
TAB 
Step 3
LOCK 
GUARD
LOCK 
BRACKET 
Step 3
FRAME
Long 
Screws 
Step 5
Step 6
Short 
Screws 
Step 8
LARGE 
HOLE in 
LOCK 
BRACKET 
Step 4
Arrow 
Lock Key
Arrow 
Lock Key
PHOTO #4 
PHOTO #3 
Top Tab 
Retracted bolt 
PHOTO #6 


