Top 10 Locking Mailbox Insert – Post-Mount Mailboxes

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1. Mail Boss

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Black,Large, Mail Boss 7506 Mail Manager Curbside Locking Security Mailbox

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Mail Boss #ad - Patented: includes patented anti-pry latch lock mechanism to prevent leveraged entry with a screwdriver & high security anti-drill, anti-pick 12-disc wafer lock.

Accessories: includes concealed outgoing mail clip, 3 keys, and required installation hardware. Usps approved full-service residential locking security mailbox prevents mail-identity theft; Stainless steel hinges for ease of use. Security: innovative baffle door accepts small parcels, packages, and a box of checks and also deters fishing. Does not include or require Mounting Plate. Quality: 14- and 16-gauge galvanized welded steel construction defends against vandalism.
BrandMail Boss #ad
ManufacturerMail Boss #ad
Height11.25 Inches
Length21 Inches
Weight22 Pounds
Width10.75 Inches
Part Number7506
Model7506
WarrantyLimited lifetime.

2. Qualarc

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Qualarc LKIT Galvanized Steel Universal Locking Insert for E1 Economy Mailboxes

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Qualarc #ad - Incoming mail slot opening: 6-3/8 inch w x 1 inch H. Comes with 2 keys and heavy duty lock. Larger mail, magazines and Outgoing mail can be placed on top of the locking insert. Turn your e1 economy mailbox into a locking mailbox with this insert. Product dimensions: 5. 8 inch w x 4. 5 inch h x 14. 9 inch D.
BrandQualarc #ad
ManufacturerQualArc #ad
Height4.5 Inches
Length14.9 Inches
Width5.8 Inches
Part NumberE1-LKIT
ModelE1-LKIT

3. ARCHITECTURAL MAILBOXES

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Architectural Mailboxes 6200B-10 Oasis Classic Locking Post Mount Parcel Mailbox with High Security Reinforced Lock,Black,18.00 x 15.00 x 11.50 inches

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ARCHITECTURAL MAILBOXES #ad - Postmaster general approved and patented design allows delivery of mail bundles and small parcels - perfect for Internet and catalog shoppers.

18-inch d x 14-inch h x 11. 5-inch w, 23-pound - use adapter Plate 7530-10 for 4x4 wood post installation. Body constructed of heavy 16 and 18 gauge galvanized steel fully powder coated prior to assembly for durability and long life. Doors include rubber seals to keep deliveries clean and dry - all hardware made from stainless steel and other corrosion resistant materials. Suitable for installation into a pilaster or column - the entire outer shroud is one piece to resist moisture and the elements.
BrandARCHITECTURAL MAILBOXES #ad
ManufacturerArchitectural Mailboxes #ad
Height14 Inches
Length18 Inches
Weight5.91 Pounds
Width11.5 Inches
Part Number6200B-10
Model6200B-10
Warranty1 year manufacturer limited warranty.

4. Qualarc

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Qualarc LMC-LKIT Lewiston Mailbox Locking Conversion Kit Black, 16"D x 6.5"W x 5"H

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Qualarc #ad - Convert your non-locking lewiston mailbox into a locking mailbox. Made of powder coated steel. Locking door opening: H 5”x w 6 3/8 inch. Comes with heavy duty lock and set of keys. The locking box secures inside of your lewiston mailbox. Incoming mail slot opening: 6 3/8 inch width and 1” height. Adds security to keep mail out of reach from unwanted hands.
BrandQualarc #ad
ManufacturerQualarc #ad
Height5 Inches
Length16 Inches
Weight4 Pounds
Width6.5 Inches
Part NumberLMC-LKIT
ModelLMC-LKIT

5. ARCHITECTURAL MAILBOXES

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Architectural Mailboxes 6300B-10 Oasis 360 Locking Parcel Mailbox, Black, Extra Large

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ARCHITECTURAL MAILBOXES #ad - L x 1. 5 in. Predrilled 4 in. Accepts parcels 9. 5 in. Dual door locking parcel mailbox, two doors for easy access. Usps approved oasis 360 locking mailbox is 11. 3 in. D. W x 11. 5 in. Hardware and mounting bracket may be required to mount to posts not manufactured by Architectural Mailboxes not included. Mounting holes in floor allows for easy installation. W x 3. 5 in. Galvanized steel construction that is fully powder coated inside and out for added corrosion resistance. H x 20 in. H. X 10 in. W x 12. 6 in. L x 2. 5 in. H to 9. 5 in.
BrandARCHITECTURAL MAILBOXES #ad
ManufacturerArchitectural Mailboxes #ad
Height11.5 Inches
Length20 Inches
Weight15.8 Pounds
Width11.3 Inches
Part Number6300B-10
Model6300B-10
WarrantyLimited lifetime.

6. Mail Boss

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Mail Boss 7526 Mail Manager Street Safe Locking Security Mailbox, Black

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Mail Boss #ad - Secure access door with commercial grade high security 12 disc wafer lock deters drilling and picking. Usps approved. Innovative baffle door accepts mail bundles and small packages allowing for true security to prevent phishing. Rear locking access door for safe retrieval of mail and parcels away from street traffic. Bi-cam anti-pry latch locking mechanism featuring a chrome-alloy tempered steel hook cam.
BrandMail Boss #ad
ManufacturerEpoch Design LLC #ad
Height11.06 Inches
Length21.48 Inches
Width10.83 Inches
Part Number7526
Model7526
WarrantyLimited lifetime.

7. Salsbury Industries

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Salsbury Industries 4145P-BLK Cast Aluminum Column Mailbox with Locking Plain Door, Black

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Salsbury Industries #ad - Mailboxes can be mounted in columns, masonry or walls. Accessed from the front through a locking 8-1/2" W x 6-1/2" H door and include a gold finish lock with 2 keys. Feature a plain door design.
BrandSalsbury Industries #ad
ManufacturerSalsbury Industries #ad
Height13.25 Inches
Length15.75 Inches
Weight11.14 Pounds
Width11.25 Inches
Part Number4145P-BLK
Model4145P-BLK

8. Special Lite Products Company, Inc.

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SCB-1005 and SCB-1015, Black, SCC-1008, Special Lite Products LB-998 Locking Insert for SCF-1003

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Special Lite Products Company, Inc. #ad - Powder coated finish. Maintenance free cast aluminum. The bottom of the lock box is open. L x 6. 75 in. H 4 lbs. 18 in. W x 4. 75 in. Fits classic, Floral and Hummingbird curbside mailboxes.
BrandSpecial Lite Products Company, Inc. #ad
ManufacturerSpecial Lite Products #ad
Height5 Inches
Length18 Inches
Weight5 Pounds
Width6.75 Inches
Part NumberLB-998, LB-998-BL, LB-998-BLK
ModelLB-998-BLK
WarrantyOne year warranty from date of purchase on manufacturers defects

9. Salsbury Industries

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Beige, Salsbury Industries 4145E-BGE Cast Aluminum Column Mailbox Locking Eagle Door

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Salsbury Industries #ad - Mailboxes can be mounted in columns, masonry or walls. Feature an eagle door design. Feature a durable powder coated finish available in black, green, beige and white. Salisbury industries is an iso 9001: 2008 certified company and has excelled in the field of manufacturing since 1936. Accessed from the front through a locking 8-1/2" W x 6-1/2" H door and include a gold finish lock with 2 keys.
BrandSalsbury Industries #ad
ManufacturerSalsbury Industries #ad
Height13.25 Inches
Length15.75 Inches
Weight20 Pounds
Width11.25 Inches
Part Number4145E-BGE
Model4145E-BGE

10. Qualarc

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Qualarc E1-MLBX-LKIT-GRN Rust Proof Galvanized Mailbox with Locking Insert, Green, Steel Latch and Red Aluminum Flag

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Qualarc #ad - Locking door opening: 6-3/8"w x 5"h. Product dimensions: 5. 8"w x 4. 5"h x 14. 9"d. Tough powder coated finish will not scratch. Secure your mail with this locking mailbox made of galvanized steel that will not rust. Incoming mail slot opening: 6-3/8"W x 1"H. Larger mail, magazines and outgoing mail can be placed on top of the locking insert.
BrandQualarc #ad
ManufacturerQualArc #ad
Height4.5 Inches
Length14.9 Inches
Weight5 Pounds
Width5.8 Inches
Part NumberE1-MLBX-LKIT-GRN
ModelE1-MLBX-LKIT-GRN