Wing Nut for Tie Rods

A Wing Nut is a heavy-duty formwork accessory used with a Tie Rod to fasten and secure formwork panels during concrete casting. The unique wing design allows easy tightening and loosening without special tools, making it highly efficient for construction sites. NOVSA manufactures precision-engineered Wing Nuts suitable for 15/17 mm, 20 mm, and 26 mm Tie Rods, ensuring maximum load-bearing capacity and durability.

NOVSA Wing Nut – Size & Weight Chart

Tie Rod Diameter

Wing Nut Type

Load Capacity (kN)

Approx. Weight (kg/pc)

Material

15/17 mm

2-wing / 3-wing

90 – 110

0.45 – 0.60

Ductile Cast Iron / Forged Steel

20 mm

2-wing / 3-wing heavy

130 – 150

0.75 – 0.90

Cast Iron / Steel

22 mm

Heavy-duty 2-wing

150 – 170

1.00 – 1.20

Forged Steel

26 mm

Extra heavy 2-wing type

200 – 220

1.30 – 1.50

Forged Steel

Standards for NOVSA Wing Nut

Standard

Description

DIN 18216

German Standard for formwork accessories including tie rods, wing nuts, and anchor nuts.
EN 1065
European Standard for load-bearing scaffolding and props, covering accessories.
BS 1139
British Standard for scaffolding fittings ensuring strength & durability.
EN ISO 898-2
Mechanical properties of nuts made of carbon steel and alloy steel.
IS 1367 / IS 1363
Indian Standards for threaded components including nuts and bolts.
ASTM A563
American Standard covering mechanical properties of carbon and alloy steel nuts.

Material Grade for NOVSA Wing Nut

Material Grade

Equivalent Standard

Tensile Strength

Application

Ductile Cast Iron (SG Iron, Grade 400/12, 500/7)

EN-GJS-400 / EN-GJS-500

400 – 500 MPa

Standard formwork Wing Nuts, reusable in multiple cycles.

Malleable Cast Iron

ASTM A47 / IS 210

300 – 400 MPa

Economical option for medium-duty applications..

Carbon Steel (C15 / C20)

DIN C15 / AISI 1018 / 1020

370 – 450 MPa

Standard Wing Nuts for 15/17 mm Tie Rods.

Medium Carbon Steel (EN 8 / C45)

DIN C45 / AISI 1045

600 – 800 MPa

Heavy-duty Wing Nuts for 20–26 mm Tie Rods.

Alloy Steel (EN 19 / 42CrMo4)

AISI 4140 equivalent

800 – 1000 MPa

Extra heavy-duty Wing Nuts for high-rise and bridge projects.

Surface Finish for NOVSA Wing Nut

Surface Finish

Description

Advantages

Self-Colour (Black)

Natural steel/cast iron finish without coating.
Cost-effective for short-term projects.

Painted / Powder Coated

Protective paint or powder layer.
Basic corrosion resistance, suitable for indoor or low-humidity sites.

Electro-Galvanized

Thin zinc layer applied through electroplating.
Shiny finish, medium corrosion resistance.

Hot-Dip Galvanized

Thick zinc coating (as per EN ISO 1461).
Superior protection for outdoor and long-term applications.

Zinc Plated

Smooth zinc finish with consistent appearance.
Good balance of cost and protection, reusable formwork cycles.