Kingsbury Rear Retrieval Letterbox

The Kingsbury rear retrieval mailbox is ideal for installation into metal railings above a dwarf wall of into a wrought iron gate.  We supply a metal gae and railing fixing kit to make installation straight forward for your gate and railing manufacturers.

The LS01 can easily and securely be fitted into walls made of brick or stone. Including dry stone walls.

Here is an image of a cross section of the Kingsbury rear retrieval letterboxfitted into a stone wall.

As can be seen, your mail is delivered through the letter plate at the front of the mailbox and collected from the rear.

A massive advantage of fitting the letterbox into a brick wall is that the mail is more protected.

A restrictor plate can be added for even more security.

Finished in powdercoat enamel, this rear retrieval letterbox is available in a range of colours, shown here in anthracite grey.

The dimensions of the standard model are 425mm high, 295mm wide and 230mm deep.

Exploded view of the metal railings and fixings kit. All fixings are included.

Note that the securing bars are not powder coated as they will need to be cut and welded into the gates or railings and then painted in the same paint as the existing ironwork.

Vertical railings are removed before the support bars (shown in red) are cut to length and then welded into place

The Lettasafe wooden fence and gate fixing kit consists of 2 powder coated right angled brackets which are fitted to the centre sleeve of the rear letterbox collection box. and then screwed to the rear of the wooden fence or gate.

As all gates and fences will be different thicknesses and this will have an impact on the location of the holes, therefor we cannot pre drill the collection box to accommodate the brackets. Full details including dimensions are available in the instructions section.

All  fittings are supplied with the fixing kit.

View of the rear of the through the wall letterbox fitted into a wooden fence. The brackets are shown in red.

For full instructions on how to fit the LS01 Kingsbury, see the instructions section.

The LS01 Kingsbury mailbox with rear collection can simply and securely be attached to the side of a brick pier o wall using our Lettasafe side mount fixing kit.

The kit can be used to attach the Kingsbury letterbox to either side of a brick pier or wall.

The Lettasafe side mounting fixing kit consists or a fabricated plate which is attached to either side of a brick pier or wall using the concrete screws provided.

The mail collection box is then attached to the plate using the remaining fixings.

For full details on attaching the LS01 letterbox to the side of a brick pier, see the instructions section.

When there is a requirement to securely fit our LS01 rear retrieval through a twin wire fence then our twin wire fence fixing kit should be used.

This image shows an LS01 fitted into a twin wire fence using the Lettasafe twin wire fixing kit.

Our twin wire letterbox fixing kit consists of two 3mm thick steel plates which are fabricated to accommodate this range of through wall letterboxes. They work by securely clamping the two halves of the fixing kit to the twin wire fence and then attaching the Kingsbury LS01 letterbox to the mounting holes in the fixing kit plates..

Full instructions are available in the instructions section.

The rear wall fixing kit consists of a specially designed steel plate fabricated to suit our LS01 rear retrieval mailbox. The plate is secured to the wall by the 4 anchor bolts and then the letterbox is attached to the plate.

The kit is available in a textured black powder coat finish and all fixings are supplied.

Image of the rear access mailbox attached to a brick garden wall.

For full fixing details see the instructions section.

The panel on the front casting of the LS01 is intended to be used to include an optional property number or name.

We offer a range of colours to compliment your letterbox colour.

The lettering is made from a high quality vinyl which is guaranteed for at least 7 years.

We also manufacture separate house plaques made froma variety of materials including slate and hardwood.

House numbers

Shown here are examples of house numbers in a variety of colours.

House names

House or property names are also available. Shown here are a few examples of lettering layouts.

As we have a vast experience in laying out your property details, we recommend that you leave this to us. However if you have something specific in mind then please call us at the time of ordereing so we can discuss your requirements.

Lettering colours

To compliment your letterbox finish, there are a choice of 6 house name and number colours available.

Ivory and gold are ideal for a letterbox finished in racing green, whereas maroon works well with a white mailbox..

Silver, cream and white coloured lettering are ideal for a black letterbox.

These are the dimensions of the front casting of the LS01 Kingsbury rear retrieval letter box.

• A = 230mm The width of the front opening of the letterplate. Perfectly adequate for A4 envelopes.

• B = 57mm This is the height of the letter opening, deep enough for typical Amazon parcels.

• C = 295mm, the with of the front aluminium mailbox casting. This is 20mm wider than the width of the letterbox container.

• D = 425mm, the overall height of the LS01 Casting, this is approximately 25mm taller than the overall height of the collection box.

Shown below are the Kingsbury depth dimensions..

Dimension A is the depth of the extremes of our standard size Kingsbury mail boxes. Dimension B is the distance between the insides of the front and back castings. Dimension

• A = 287mm, B = 220mm. For our standard depth case suitable for a 9" garden wall.

• A = 405mm , B = 338mm. This depth is suitable for a 1½ brick deep wall or pier. Note that the LS01 letterbox is too large for piers less than 2 bricks wide. We offer a selection of letter boxes suitable for narrow brick piers.

• A = 515mm, B = 448mm. Case depth suitable for a 2 brick pier. Note the inside of the left and right edge bricks will need to be shaved by about 20mm to allow the collection box to fit within the pier. see the pier and wall dimensions below.

• A = 625mm, B = 558mm.  This size fits a 2½ brick pier.

• A = 737mm, B = 670mm. Our largest standard size letterbox, suitable for a 3 brick pier. 

Dimension A, we can manufacture the Kingsbury letterbox in any depth from 169mm to 950mm

• C = 35mm, distance from the back face of the front casting to the widest point of the letter flap.

• D = 32mm, distance from the back of the rear casting to the most extreme point of the door. This dimension would be important when the space at the rear of the letterbox is restricted as a result of sliding gates etc.

Rear access door dimensions.

• A = 180mm, this is the width of the rear access door.

• B = 185mm, the height of the rear access door.

Letterbox container dimensions. 

Dimension D will vary depending on the size of the letterbox supplied. For a standard 9 inch brick wall, this will be 230mm. For the Kingsbury mailbox, this dimension is 15mm more than the depth of the wall or pier. The reason for this is because an extra 5mm is required to fit into the front and rear castings in addition to an extra 5mm allowed for building tolerances.

• A = 403mm, the distance from the bottom to the top apex of the letterbox container

• B = 383mm, this is the distance from the bottom of the mail box container to the top of the side before the apex begins. The apex of the container rises an additional 20mm from the side to the centre.

• C = 397mm, the dimension of the side of the container from the bottom of the apex to the very bottom of the sleeve.

• D  = 230mm for a standard 9 inch garden wall

• D = 348mm for a 1½ brick deep wall or pier. Note that the minimum pier width required for the Kingsbury letterbox is 2 bricks wide (approx 443mm wide).

• D = 458mm for a standard 2 brick pier. Note when fitting a Kingsbury rear retrieval mailbox into a 2 brick pier, the left and right side bricks will need to be shaved by 20mm. See wall and pier sizes below

• D = 568mm for a 2½ brick pier.

• D = 680mm for a 3 brick pier.

We can manufacture custom depth letter boxes with a container depth from 117mm to 900mm

• E = 275mm, the width of the letterbox container

• F = 13mm, this is the dimension from the bottom of the sleeve to the bottom of the letterbox container. Typically this would be bedded into the cement between courses of bricks.

Standard Metric Bricks

All of our brick wall and brick pier dimensions are based on metric bricks which are very much the standard these days here in the U.K. We can manufacture other size letterboxes to suit imperial bricks, rendered concrete blocks etc. but our standard size cases are based on the metric brick. These are the dimensions of a standard metric brick.

• W = 215mm, the width of a standard metric brick.

• H = 65mm, this is the height of a metric brick.

• D = 102mm, the depth of the metric brick. 

When fitting the LS01 the dimensions of the individual bricks are not super critical, the overall width and thickness of the brick wall or pier are the important dimensions.

Brick wall and pier sizes at a glance

These are the dimensions of the most common depth brick walls and piers.

• A = 215mm, commonly known as a 9" wall or double brick wall.

• B = 330mm, 1½ brick wall, also known as a 13½ inch wall.

• C = 445mm, 2 brick pier, commonly known as an 18 inch pier.

• D = 555mm, 2½ brick pier or a 21 inch pier.

• E = 665mm, this is a 3 brick or 27 inch pier

Note the imperial sizes used for the above are not the actual sizes of the pier or wall, they are just historic references used. The accurate dimensions are the metric ones given.

Standard 9 inch or double brick garden wall.

This is the most common depth for a garden wall. The term 9 inch wall could be misleading as it suggests that the wall is 9 inches (228mm) deep. The term 9 inch wall refers to a wall which is 215mm and not 9 inches deep.

• D = 215mm, the depth of the wall which is the same as the length of a metric brick.

• Our standard depth letter box is designed for this depth wall.

Note that the rear of the Kingsbury  mailbox slightly overhangs the back of the wall. We manufacture our through the wall letterboxes with a 5mm tolerance to allow for the fact that bricklaying is not as accurate as metal fabrication.

1 ½ brick garden wall.

Brick walls this depth are not common. They are also known as 13½ inch wall (or pier). A Kingsbury rear retrieval letterbox to suit a 1½ brick wall is offered as standard

• D = 330mm

• Our 1½ depth letter box is designed for this depth wall.

Note, as with all of our through wall letterboxes a building tolerance of approximately 5mm is built in to the depth of the mail collection box.

1 ½ brick pier.

As can be seen from the image of the Kingsbury LS01 through wall mailbox, a 1½ square brick pier is not suitable for this model.

This rear retrieval letterbox will fit into a 1½ brick deep pier but the width of the pier needs to be at least 2 bricks wide (445mm)

We manufacture a narrow letterbox especially designed for a 1½ brick pier or a narrow rendered brick pier. Search our website for the LS21 Chard letter box.

2 brick pier.

This size pier is probably the most common size. Also known as an 18" pier. We offer a Kingsbury rear retrieval letterbox to suit a 2 brick pier as standard.

• D = 445mm, the depth of the pier

• W = 445mm, the width of the pier

Note, although the 2 brick Kingsbury through wall mail box is offered as a standard size, the bricks on the left and right sides will need to be shaved by about 20mm to allow the letterbox to fit. See image below. If this is not possible then we do offer a narrow letter box with a smaller letter plate which will fit with no modifications.

2 brick pier.

A 2 brick pier showing only the central sleeve of the LS01 Kingsbury collection box.

• A = 80mm, the thickness of the shaved bricks on the left and right sides of the pier.

The hollow section inside a 2 brick pier is approximately 241mm. The Kingsbury collection box is 275mm wide. Therefor the space within the pier would not be enough for the letterbox to fit. To overcome this and allow the Kingsbury LS01 mailbox to fit within the centre of the pier, the thickness of the bricks either side of the collection box need to be reduced from 102mm to approximately 80mm. This will allow the collection box to fit within the pier.

2½ brick pier.

The 2½ brick pier is a reasonably common size pier. Also known as an 21 inch pier. We offer a Kingsbury rear retrieval letter box to suit this 2½ brick pier as standard.

• D = 555mm, the depth of the pier

• W = 555mm, the width of the pier

A Kingsbury mailbox fitted into a 2½ brick pier has enough space at the sides to run cables for an electric light or doorbell.

3 brick pier.

A 3 brick pier is quite a large size pier, it also known as a 27 inch pier. The Kingsbury rear collection mail box is available in a 3 brick pier size as standard.

• D = 665mm, the depth of the pier

• W = 665mm, the width of the pier

There is a good deal of room either side of the collection box to run cables for an itercom or a carriage light for example.

Exploded view

• A = Front casting including letter plate. Cast from 100% pure aluminium.

• B = Rubber seal x 2. To ensure that your mailbox remains watertight, the rubber seals are f itted between the front and back castings and the centre sleeve. 

• C = Centre sleeve. The cenre sleeve forms th collction area. It is made from sturdy galvanised steel. The standard depth of the centre sleeve is 230mm, this can be reduced to approximately 100mm or extended up to 900mm

• D = Rear casting with door and lock. As the front castings, the rear is cast from solid aluminium.

• E = Studs x 4. The four stainless steel studs are used with the TNuts (G) to lock the components together.

• F = Nylon washers x 4. These protect the powder coat finish when tightening the TNuts (G)

• G = TNuts x 4. Solid prass TNuts with a nickel finish are used in conjuction with the stainless steel studs (E) to securely clamp the letterbox together for a secure and watertight mailbox.

Exploded view

• A = Front casting with built in letter plate.

• B = Rubber seal x 2. These fit between the front and rear castings and centre sleeve.

• C = Centre sleeve. The dimension of the centre sleeve varies depending on location and customer requirements.

• D = Rear casting with vertically lifting lockable door.

• E = Stainless steel studs x 4. These screw into the front casting  and are used to clamp the components together with the brass TNuts (G)

• F = Nylon washers x 4. These protect the powder coat finish when tightening the TNuts (G)

• G = Solid brass TNuts x 4. These are threadedonto the stainless steel studs to tighten the letterbox components together.

Step 1

Place the letterbox face down on a bench or table using a soft cloth to protect the front casting.

Use the 4mm Allan (hex) key to undo the TNuts (G) in each corner of the back casting.

Ensure that the hex key is fully inserted and turn anti-clockwise to release the TNut.

The stainless steel stud (E) may remain attached to the TNut (G). If so then withdraw the stud and leave the TNut attached to the stud.

Store the nylon washer in a safe place.

Repeat for all four TNuts.

Step 2

Seperate the front and rear castings (A & D) from the centre sleeve (C). See exploded view.

Ensure that the rubber seals (B) remain properly fitted to the centre sleeve.

Studs which remain attached to the front casting will need to be removed. Unscrew the stud by using a pair of grips or pliers to turn out the stud. Grip the stud in the middle as shown to avoid damaging the ends of the thread. Replace the TNut (G) onto the stud by screwing on 2 turns only and store ready for reassembling the mailbox.

Step 1

If the letterbox is just being assembled and not fitted then position the front casting face down on top of a soft towel on a bench or table and work upwards. Otherwise you will need the help of an assistant to hold the front casting in place whilst the letterbox is being assembled.

Ensure that the rubber seals (B) are correctly located and fitted to the centre sleeve (C)  then push the centre sleeve into the front casting. You will need to support the centre sleeve until at least 2 of the studs have been screwed into place.

Step 2

If not already done, place the washes on each of the 4 studs and screw the TNuts a couple of turns onto each stud.

Ensuring that the rubber seal is properly in place, locate the sleeve into the rear casting.

Whilst still holding the rear casting in place, Insert the 4 studs into the fixing holes and locate them with the female fixing points of the front casting. Screw the studs in a couple of turns by turning the stud clockwise between your fingers.

After all 4 studs have been located, working in a circle, tighten the 4 TNuts using the 4mm hex key a bit at a time until the letterbox is secured.

Do not overtighten the TNuts as this could damage the rubber seals.