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Castle Nut

Castle Nuts, also known as Slotted Nuts, are hexagonal nuts with slots cut into one end for use with a cotter pin. They are manufactured to ASTM, DIN, and ISO standards in carbon steel, alloy steel, stainless steel, or brass. The cotter pin passes through the nut slots and a drilled bolt hole, ensuring secure locking against vibration and loosening. Available in zinc plated, galvanized, stainless, or brass finishes, they provide durability and reliability in critical assemblies. They are widely used in automotive axles, machinery, aerospace, railways, and heavy equipment where secure locking is essential.

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Description

Premium Quality Castle Nut Supplier in Dubai, UAE

Unifastener Industries LLC is a reliable supplier and manufacturer of high-quality Castle Nuts in Dubai, UAE. The company specializes in industrial fastening solutions designed for automotive, machinery, engineering, construction, and heavy-duty industrial applications. Castle Nuts, also known as Slotted Nuts, are specially designed fasteners with slots cut into one end of the nut. These slots allow the use of a cotter pin or locking pin to prevent loosening caused by vibration and movement. Castle Nuts are widely used in applications requiring high safety and secure locking performance. Manufactured using premium-grade materials and precision engineering, Castle Nuts provide excellent strength, durability, corrosion resistance, and reliable fastening performance in demanding environments.

Standards:
– ASTM A194 (carbon and alloy steel nuts)
– ASTM A563 (carbon and alloy steel nuts – general requirements)
– DIN 935 (slotted / castle nuts)
– ISO 703 (slotted nuts, castle type)
– ISO 898-2 (mechanical properties of nuts)

Grades:
– Carbon steel (Grades 4, 6, 8, 10)
– Alloy steel (heat-treated for high strength)
– Stainless steel A2 / A4 (AISI 304 / 316 for corrosion resistance)
– Brass (for decorative or light-duty applications)

Material Options:
– Carbon steel (zinc plated, galvanized, black oxide)
– Alloy steel (heat-treated, phosphate coated)
– Stainless steel (natural, polished, passivated)
– Brass (plain or polished finish)

Size Range:
– Metric: M6 to M48
– Imperial: 1/4″ to 2″
– Available in standard and fine pitch threads

Types:
– Standard castle nut (DIN 935)
– Low profile slotted nut
– Stainless steel castle nut
– Brass castle nut

Properties:
– Features slots cut into the hex nut, resembling a castle turret
– Designed for use with a cotter pin and drilled bolt for secure locking
– Provides vibration-resistant fastening
– Commonly used in automotive, aerospace, and heavy machinery assemblies

Coating Options:
– Zinc electroplated (clear, yellow, or black)
– Hot-dip galvanized (ASTM A153 / DIN EN ISO 1461)
– Phosphate and oil finish (for alloy steel)
– Nickel or chrome plated
– Stainless steel natural finish

Add-ons:
– Supplied with cotter pins on request
– Available in high-strength and corrosion-resistant variants
– Certification/test reports (tensile, hardness, coating thickness) available on request

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