'Other' Construction and Allied Systems Info & Downloads
Nuts and Bolts (Construction) Construction Sets
'Nuts and Bolts' metal construction sets had identical parts to Eitech Construction. It was manufactured in the China by Polylong. Thought to date from the 2000s and 2010s. Note that although the set boxes had the name 'Nuts and Bolts' on them, the instructions were headed 'Construction'. The design and colours of the instructions and logo at the bottom are almost identical to Eitech. Looks to be very much a clone.
Info from the Metal Constructional Systems Database for POLYLONG 
2003 to in production in 2018 and continuing
25 (see comment *1)
4.2 (see comment *2)
Bolts: pan (crosshead)
Steel with a Bright Zinc plated finish
6.5(see comment *3)
Various Sets (see separate list) from Polylong & other makers. Most parts as CONSTRUCTION  but some others. *1 Mod.1 & finer for Motor/Gear Unit.. *2 Square holes in some RCEE sets, see TRONICO [a]. *3 6.1 & 7.4 also reported.
Below there are manuals/instructions which can be downloaded by clicking on the appropriate image.
© 2010-2019 Timothy Edwards