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Kep Nut

KEP Nuts, also known as Washer Nuts or Hex Nuts with Captive Star Washers, combine a hexagonal nut with an attached external tooth lock washer. They are manufactured to ASTM, DIN, and ISO standards in carbon steel, stainless steel, or brass. The captive washer provides excellent locking action, resists loosening under vibration, and saves assembly time by eliminating a separate washer. Available in zinc plated, galvanized, stainless, brass, or black oxide finishes, they provide secure fastening with added corrosion resistance. They are widely used in electronics, appliances, automotive, and general sheet-metal applications where vibration resistance is important.

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Description

Premium Quality Kep Nut Supplier in Dubai, UAE

Unifastener Industries LLC is a reliable supplier and manufacturer of high-quality Kep Nuts in Dubai, UAE. The company specializes in industrial fastening solutions designed for automotive, machinery, electrical, engineering, and industrial applications. Kep Nuts, also known as K-Lock Nuts or Washer Nuts, are specially designed fasteners that combine a hex nut with a free-spinning external tooth lock washer. This integrated washer helps prevent loosening caused by vibration while improving fastening efficiency and installation speed. Manufactured using premium-grade materials and precision engineering, Kep Nuts provide excellent locking performance, durability, corrosion resistance, and reliable fastening for demanding industrial environments.


Standards:
– ASTM A563 (carbon and alloy steel nuts – general requirements)
– ASTM A194 (alloy and stainless steel nuts)
– DIN 7967 (self-locking nuts with external teeth washer)
– ISO 10511 (prevailing torque type nuts)
– ISO 898-2 (mechanical properties of nuts)

Grades:
– Carbon steel (Grades 4, 6, 8)
– Stainless steel A2 / A4 (AISI 304 / 316 for corrosion resistance)
– Brass (for decorative or non-magnetic applications)

Material Options:
– Carbon steel (zinc plated, black oxide, galvanized)
– Stainless steel (natural, polished, passivated)
– Brass (plain or polished finish)

Size Range:
– Metric: M3 to M16
– Imperial: #4 to 5/8″
– Thread pitch: coarse (standard) or fine, UNC/UNF

Types:
– Standard KEP nut (hex nut with captive external star washer)
– Stainless steel KEP nut
– Brass KEP nut
– High-strength alloy KEP nut

Properties:
– Combines a hex nut with an attached external tooth lock washer
– Provides vibration resistance and prevents loosening
– Teeth bite into the surface for strong locking action
– Eliminates need for separate washer, reducing assembly time
– Suitable for light to medium load applications

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

Add-ons:
– Available with internal star washer (special variants)
– Supplied in industrial bulk packs or retail kits
– Certification/test reports (prevailing torque, hardness, coating thickness) available on request

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