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Dome Cap Nut

Long Nut / Coupling Nut

Long Nuts, also known as Coupling Nuts, are extended hexagonal nuts used to connect two threaded rods or bolts together. They are manufactured to ASTM and DIN standards, providing strong thread engagement and reliable load transfer. Available in carbon steel, alloy steel, stainless steel, and brass, they are suited for structural and mechanical applications. Coupling nuts are often used in construction, scaffolding, machinery, and suspension systems. They ensure alignment, adjustability, and continuity in threaded assemblies across various industries.

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Description

Premium Quality Long Nut / Coupling Nut Supplier in Dubai, UAE

Unifastener Industries LLC is a reliable supplier and manufacturer of high-quality Long Nuts and Coupling Nuts in Dubai, UAE. The company specializes in industrial fastening solutions designed for construction, engineering, fabrication, machinery, and heavy-duty industrial applications. Long Nuts, also known as Coupling Nuts or Extension Nuts, are elongated threaded fasteners used to connect two threaded rods or bolts securely. These nuts are widely used in structural assemblies, support systems, machinery installations, and industrial applications where extended fastening connections are required. Manufactured using premium-grade materials and precision engineering, Long Nuts provide excellent strength, durability, corrosion resistance, and reliable fastening performance in demanding environments.


Standards:
– ASTM A563 (carbon and alloy steel nuts)
– ASTM A194 (high-temperature and pressure service nuts)
– ASTM F594 (stainless steel nuts)
– DIN 6334 (long hexagonal coupling nuts)
– ISO 4036 (equivalent to DIN 6334)

Grades:
– ASTM Grades: A563 (A, B, C, DH), A194 (2H, 7, 8, 8M)
– Stainless Steel Grades: A2 / A4 (ASTM F594)
– DIN / ISO Grades: 4, 6, 8, 10

Material Options:
– Carbon steel
– Alloy steel (quenched & tempered)
– Stainless steel (A2 / A4 grades)
– Brass
– Aluminum (for lightweight applications)

Diameter Range: M6 to M48 (metric) / 1/4″ to 2″ (inch)

Length Range: Typically 3× to 4× across-flat dimension (per DIN 6334)

Thread Types:
– Metric coarse pitch (DIN 13 / ISO 261)
– Metric fine pitch (on request)
– UNC (Unified Coarse, ASTM)
– UNF (Unified Fine, ASTM)

Types:
– Standard long hex coupling nut (DIN 6334)
– Reduced hex coupling nut (slimmer profile)
– Round coupling nut (custom type)

Properties:
– Designed to join two threaded rods or bolts together
– Provides extended thread engagement for strength
– Commonly used in tensioning systems, supports, and long assemblies

Coating Options:
– Plain (self-color, oiled)
– Zinc electroplated
– Hot-dip galvanized (ASTM A153 / DIN EN ISO 1461)
– Black oxide
– PTFE / Xylan coated

Add-ons:
– Can be paired with threaded rods (ASTM A193 / DIN 976)
– Available with left-hand or right-hand threads
– Certification (MTC, third-party inspection) available

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