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BS1139 Scaffolding Screw Jack Base Nut for Construction

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Scaffolding Base Jack Nut 1) Material: Q235 2) Nut Diameter: 76.23mm or per design 3) Nut Hegith:49.34mm or requst 4) Nut Length: 20mm or per design 5) Threaded Tube or Rod Size: 32mm, 34mm, 35mm or 38mm 6) Surface Treatment: Galvanized 7) Processing Way: Drop Forged 8) Standard: BS1139, EN74
  • Scaffolding Jack Base Nut
  • EK
  • 730890000
  • 32mm, 34mm, 35mm, or 38mm
  • Q235 
  • Zinc-Plated 
  • 1.12KG

BS1139 Scaffolding Screw Jack Base Nut for Construction

Production Information

Commodity Name Scaffolding Jack Base Nut

Main Material

Q235 or Q345

Nut Tube Outer Diameter

76mm or per design

Nut Height

49.0mm or per request

Nut Length

20mm or per request

Threaded Tube or Rod size 32mm, 34mm, 35mm or 38mm

Surface treatment

Electro Galvanized, HDG, or Black


Competitive price, High-quality   products, 24-hour after-sales service






L/C, T/T, 30% in advance


Steel Pallets or customized

How is base jack used in Scaffolding?

The base jack levels the scaffold tower when the tower legs are placed on surfaces of different elevations. It ensures all the legs will have (appx) equal bearing on the substrate(s) the tower rests upon.

Unless the jack is placed on something solid, it will need dunnage underneath it to properly transfer the leg load into the soil.

It is also used to ‘fine tune’ the height of the tower itself, so that height adjustments of up to around 12″ can be achieved.

Essentially, a base jack is a load bearing base and is used to hold standards/uprights (the vertical tubes) in place and help transfer the weight of the structure to the ground. The base jack is used to help spread the load and has a shank in the center to hold the tube in place. To eliminate sway, a facade brace is fitted to the face of the scaffold every 30 meters. The spacing of the upright scaffolding and base jacks is usually around every 2.1m but this can be reduced to 2m or 1.8m depending on the weight of the structure.

Product Images

Jack Base Nut 4

Other scaffolding material we common export

1) British Standard Markings on goods

British Standard Scaffolding

2) D/F Double, Sweivel, Sleeve, Putlog, BRC, Girder Couplers

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3) Hot-dip Galvanized Scaffolding Steel Tubes

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3) Ringlock, Cuplock, Kwikstage, Haki, Frame, Prop Scaffolding Systems


4) Other Accessories

Steel LadderProps

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