Cup Nut 28 MM/ 30 MM

Scaffolding cup nuts are specialized fasteners used primarily in cup lock (or cuplock) scaffolding systems, which are common in construction for formwork and access platforms. These nuts secure tie rods or threaded components, such as in wall formwork or base jacks, ensuring structural stability during concrete pouring or elevated work. They are typically made from cast iron or ductile materials, available in sizes like 28mm, and feature designs that resist water seepage in retaining structures.

Key Features

Cup nuts lock without bolts or wedges in cuplock setups, using a blade-and-cup mechanism for quick assembly—up to four ledgers per node with a hammer blow. They pair with wing nuts or water barrier variants for adjustable height (e.g., 5mm pitches) and tensile strength in standards or spigots. Durable finishes like hot-dip galvanizing extend lifespan in industrial applications

Cup nuts for solid jack rods are specialized cast steel fasteners used in scaffolding and formwork systems, particularly with solid base jacks or U-head jacks to secure and adjust threaded rods. They feature a cup-shaped design that fits over the jack’s threaded end, allowing height adjustments and load distribution on solid rods typically 32-38mm in diameter.

Key Specifications

Common sizes range from 26mm to 38mm inner diameter, made from durable cast iron or steel with options for self-finish, zinc-plated, or galvanized coatings to resist corrosion. Weights vary around 380 grams per unit, supporting vertical loads in scaffold bases and formwork props.