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Square Nut

Square Nuts are four-sided nuts designed to provide a greater bearing surface compared to standard hex nuts. They are manufactured to ASTM and DIN standards and are available in standard, thin, and heavy-duty forms. The square profile reduces the risk of rounding and allows better grip during tightening and loosening. They are often used with square-headed bolts, carriage bolts, and in timber or metal structural applications. Square Nuts are widely used in railways, construction, furniture, machinery, and restoration of vintage structures.

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Description

Premium Quality Square Nut Supplier in Dubai, UAE

Unifastener Industries LLC is a reliable supplier and manufacturer of high-quality Square Nuts in Dubai, UAE. The company specializes in industrial fastening solutions designed for construction, engineering, fabrication, machinery, and heavy-duty industrial applications. Square Nuts are four-sided fasteners designed to provide a larger contact surface and improved resistance against loosening. These nuts are commonly used in heavy-duty fastening applications, channel assemblies, industrial equipment, and structural systems where strong and secure fastening is required. Manufactured using premium-grade materials and precision engineering, Square Nuts offer excellent durability, corrosion resistance, and reliable fastening performance in demanding environments.


Standards:
– ASTM A563 (carbon and alloy steel nuts)
– ASTM F594 (stainless steel nuts)
– DIN 557 (standard square nuts)
– DIN 562 (thin square nuts)
– ISO 4034 (equivalent to DIN 557)

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

Material Options:
– Carbon steel
– Stainless steel (A2 / A4 grades)
– Alloy steel
– Brass
– Cast iron (special heavy-duty applications)

Diameter Range: M4 to M36 (metric) / #8-32 to 1-1/2″ (inch)

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

Types:
– Standard square nut (DIN 557)
– Thin square nut (DIN 562)
– Heavy square nut (for structural applications)

Properties:
– Larger surface contact area than hex nuts
– Provides higher resistance to loosening in assemblies
– Easy to grip with tools, especially in older structures

Coating Options:
– Plain (self-color, oiled)
– Zinc electroplated
– Hot-dip galvanized (ASTM A153 / DIN EN ISO 1461)
– Black oxide
– Nickel plated (for decorative or corrosion resistance)

Add-ons:
– Can be supplied with square bolts or carriage bolts
– Compatible with flat and spring washers
– Certification (MTC) available upon request

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