Props Nut Scaffolding Prop Nut & Jack Nut

A Props Nut, also called a Jack Nut, is a heavy-duty threaded component used in Adjustable Scaffolding Props. It is fitted on the outer tube and allows smooth height adjustment of the inner tube by rotating the nut up or down.
NOVSA manufactures Props Nuts with precision threading and high-strength steel casting to ensure easy operation, long service life, and high load-bearing capacity.

NOVSA Props Nut

  • Made from Malleable Cast Iron / S.G. Iron / Mild Steel.
  •  Available in Drop Forged / Casted type.
  • Designed with flange wings for easy handling and rotation.
  • Standard thread types: Acme Thread / Square Thread.
  • Compatible with 40 mm – 76 mm diameter prop tubes.
  • Surface Finish: Self-Colour, Zinc-Plated, Painted, or Galvanized.
  • Complies with BS 1139 & EN 74 standards.

Props Nut – Size & Weight Chart

Tube Diameter (mm)

Nut Type

Thread Type

Approx. Weight (kg/pc) 

48 mm (Standard)

Cast Iron Nut

Square Thread

1.0 – 1.3

48 mm (Heavy Duty)

S.G. Iron Nut

Square / Acme Thread

1.4 – 1.8

60 mm (Standard)

Cast Iron Nut

Square Thread

1.6 – 2.0

60 mm (Heavy Duty)

S.G. Iron Nut

Square / Acme Thread

2.1 – 2.5

76 mm (Extra Heavy)

M.S. Forged Nut

Square / Acme Thread

2.8 – 3.2
  • Compatible with Inner & Outer Tubes of Adjustable Props.
  • Available in Wing Nut, Collar Nut, and Sleeve Nut types.

Surface Finish for Props Nut

NOVSA Props Nuts are designed for heavy load-bearing applications and to withstand tough site conditions. To ensure durability and protection against corrosion, different surface finishes are offered.

Finish Type

Description

Advantage

Electro-Galvanized (EG)

Thin zinc coating applied via electroplating.

Smooth surface, cost-effective, good for standard use.

Hot-Dip Galvanized (HDG)

Dipped in molten zinc for a thick protective layer.

Maximum corrosion resistance, ideal for outdoor & long-term projects.

Powder Coated / Painted

Painted or powder-coated in different colours.

Aesthetic finish, medium protection, economical.

Self-Colour (Black Steel)

Supplied without coating, natural steel finish.

Budget-friendly, suitable for short-term use.
All NOVSA Props Nuts are manufactured and tested according to BS 1139 & EN 74 standards, ensuring safety, strength, and global compatibility.

Standards for NOVSA Props Nut

Standard

Description

BS 1139

British Standard for scaffolding fittings & adjustable components, covering dimensions & safety.

EN 74

European Standard for forged fittings, couplers, and threaded components like prop nuts.

EN 12811

Defines performance requirements and load testing for temporary works equipment.
Each NOVSA Props Nut undergoes thread accuracy checks, load-bearing tests, and dimensional inspections before dispatch.

Material Grades for Props Nut

NOVSA manufactures Props Nuts from high-quality casting and forging grades, ensuring high strength, durability, and long service life under heavy load conditions.

Material Grade

Standard

Properties / Advantages

Malleable Cast Iron

IS 210 / EN 1562

Good strength, cost-effective, suitable for standard scaffolding props.

S.G. Iron (Ductile Iron)

IS 1865 / EN 1563

High tensile strength, better ductility, shock resistance, ideal for heavy-duty props.

Mild Steel (IS 2062 – E250/E275)

Indian / International Standard

Excellent weld ability, durable, used in forged prop nuts.

Carbon Steel (S235JR / S275JR)

EN 10025

Superior strength, preferred for extra heavy-duty scaffolding props.