Hex Flange Nuts

Hex Flange Nuts – Hexagonal Flange Nut Manufacturer & Supplier in UAE

Asia Bolts Industries LLC is a specialist Hex Flange Nut manufacturer and supplier based in Dubai, UAE, delivering precision-engineered flange nut fastening solutions to the oil & gas, petrochemical, automotive, construction, HVAC, and mechanical engineering sectors across the GCC and global markets since 1997. Our Hex Flange Nuts combine the clamping security of a standard hex nut with an integrated load-spreading flange — reducing component count, simplifying assembly, and delivering superior joint performance in applications where washer misalignment, surface damage, or vibration-induced loosening are key engineering concerns.

What Are Hex Flange Nuts?

Hex Flange Nuts are hexagonal nuts with a wide circular flange formed integrally on the bearing face of the nut. This flange serves the same function as a flat washer — distributing the compressive clamping force over a larger bearing area on the joint surface — but as a single integrated component, eliminating the separate washer handling, positioning, and potential misalignment issues associated with loose washer assemblies.

They are available in two principal configurations:

Non-Serrated Hex Flange Nuts
A smooth flange underside providing clean, even load distribution without surface marking. Preferred for softer mating materials, painted or coated surfaces, and applications where surface aesthetics matter. Provides washer-replacement functionality without additional vibration resistance beyond the hex nut thread engagement.

Serrated Hex Flange Nuts
The flange underside incorporates concentric or radial serrations — hardened teeth that embed into the mating surface when the nut is tightened. This mechanical interlock provides positive resistance to rotation in the loosening direction under vibration and dynamic loading — effectively combining a hex nut, flat washer, and lock washer into a single fastener component. The most widely specified Hex Flange Nut configuration in the GCC automotive, HVAC, and structural sectors.

Hex Flange Nuts are widely used in:

• Automotive and vehicle assembly — engine mounts, exhaust brackets, chassis connections, suspension components
• HVAC and air handling systems — fan housings, compressor frames, ductwork flanges, chiller units
• Oil & gas surface equipment — instrument brackets, skid frames, non-critical process connections
• Structural steelwork — secondary connections, cladding rails, purlins, modular structures
• Electrical enclosures and control panels — cabinet assembly, busbar supports, cable management
• Agricultural and heavy machinery — frame connections, implement attachments, cab assemblies
• Construction and infrastructure — façade systems, curtain walling, suspended ceiling grids

Standards & Specifications

Non-standard flange diameters, custom serration profiles, fine pitch thread variants, and project-specific drawing requirements are handled by our in-house engineering team.

Materials & Grades Available

Surface treatment options include zinc electroplating, hot-dip galvanising (HDG), PTFE coating (Xylan), Geomet, Dacromet, black oxide, nickel plating, and passivation for stainless grades — selected in accordance with the corrosion exposure category and project specification.

Dimensions & Size Range

Left-hand thread and oversized flange diameter variants available on request.

Complementary Products

Customers sourcing Hex Flange Nuts from Asia Bolts Industries frequently specify alongside:

• Hex Flange Bolts — DIN 6921, matched bolt-nut flange assemblies
• Plain Flat Washers — DIN 125, DIN 9021, ASME B18.21.1 for non-serrated applications
• Spring Washers — DIN 127 where additional vibration resistance is required
• Hex Bolts & Hex Head Cap Screws — DIN 931, DIN 933, ASME B18.2.1
• Stud Bolts — ASTM A193 B7 with ASTM A194 2H heavy hex nuts
• Nylon Lock Nuts — DIN 985 for low-temperature vibration-resistant applications
• Wedge Locking Nuts — for critical high-vibration joints beyond flange nut capability

Asia Bolts can supply complete bolt-nut-washer fastener packages — including matched Hex Flange Bolt and Hex Flange Nut sets — from a single ISO certified source, simplifying procurement and consolidating your approved vendor list.