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Tan-Sad was a construction system using rods connected by tubular connecting sleeves. It was mentioned in a British Industries Fair Report in 1922, but there is some doubt as to whether it was ever actually made.

Manufacturer / Distributor

Tan-Sad Ltd., Freeman Street, Birmingham UK

Info from the Metal Constructional Systems Database for TAN-SAD

System Type
Mainly Rods/Tubes
United Kingdom
Boss Type
Boss Thread
(see comment *1)
Diametrical Pitch of Gears
No. of Parts in System
20 (estimated)
Hole Pitch (Spacing) (mm)
Diameter of holes in Strips(mm)
Diameter of the Bore in Bosses(mm)
Diameter of Axle Rods(mm)
3.2 (see comment *2)
Types of Nuts and Bolts
Nuts: --
Material/Finish of Nuts and Bolts
Size of the Nuts across Flats (mm)
Bolt diameter (mm)

1/8" Rods connected to spigotted cast Joints by tubular Sleeves. In G&T but was it ever sold? *1 Might be in possible Wheel boss. *2 Assumed.

The MCS document for this system is shown below. It can also be downloaded to your computer if desired here

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The report can be zoomed into, made full screen or downloaded as a pdf document by using the controls provided

There are currently no manuals, leaflets or photos etc. available for downloading. If you can supply any, please get in contact with me.