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Supply Management


PSIN 0910A and B Locks

In keeping with the Postal Service'sTM fundamental commitment to safeguarding customers' mail, a new generation of centralized delivery and collection equipment is either now available to the field or soon to be released.

Critical to the overall security success of this new delivery equipment and earlier generations of delivery equipment are the newly redesigned PSIN (Postal Service Item Number) O910A & B locks. These locks are included with all new equipment. The Material Distribution Center is supplying them to the field as replacement locks for all Collection Box Unit (CBU) and National Delivery Collection Box Unit (NDCBU) customer compartments, Outdoor Parcel Locker (OPL) customer access locks, and certain Indoor Parcel Locker (IPL) customer access locks.

To maximize the full benefit of these locks, there is a change in the installation technique from the old design. Maintenance Management Order MMO-086-05, available at, contains installation instructions and tips on the replacement locks. More information will be available in future issues of Maintenance Line/Update.

— Delivery and Industrial Equipment - Telecommunications Category Management Center, Supply Management, 2-2-06


If the weather is bad, be extra creful. Tips for preventing slips, trips, and falls.

Tips for preventing slips, trips, and falls

  • Watch where you’re going.
    • Your path could be slick, so watch the ground.
    • Avoid snow, ice, and wet spots if you can. Mud and wet leaves can be slick spots as well.
    • Don’t be distracted – by fingering mail or doing too many things at once.
  • Step smart, not quickly.
    • Take shorter steps and keep your whole foot on the ground with each step.
    • Be careful on uneven surfaces – like getting into or out of your vehicle. Use a handrail if one is available.
    • Wear Footwear that works for the weather.
    • Make sure you have a good tread on your soles. Wear “SR/USA”-approved footwear.
  • If it’s not safe, don’t go there.
    • Tell your supervisor when unsafe conditions, like ice or snow, prevent you from safely reaching a mail box.
  • If you start to fall, worry only about falling.
    • Drop what you’re holding. Don’t tense up.
    • Spread the impact – you’re more likely to bread something if only a single part of your body takes all the force of the fall.