The usps provides the master lock and only they have the keys to it.
Get Usps Arrow Lock Specifications Images. The united states postal service (usps) requires residential mailboxes to conform to a number of rules and regulations. Most problems and questions can only be answered by your local post office.
SPUSPS-STD-4C001 from about.usps.com
The usps provides the master lock and only they have the keys to it. The biggest improvements from the previous 4b specification are the 4c's door size and overall security. Not a lot to it so i gutted it after picking just because i could.
Many postal customers aren't aware of these regulations, then become confused when their mailbox isn't approved.
Forcing the slide rearward while the gun is in this locked position will damage the usp. All locksets shall be mortise locksets as supplied by arrow lock company. The usps has to regulate the types and styles of mailboxes allowed for residential and commercial use to prevent delays and accidents. I set up a new pin code and gave it to the supervisor.
