Dzus Fasteners' Quarter Turn Principle
The same excellent quarter-turn locking mechanism has been used on Dzus fasteners since the 1930s. Includes spring-loaded stud, wire-form receptacle and mounting grommet. When the stud is inserted and rotated 90° clockwise to contact the helical cam groove of the stud, the spring wire in the receptacle clamps the panels. A quarter turn back and it severs the link at once.
Dzus fasteners are utilised without tools, unlike threaded bolts. They can be removed with a Dzus key or a slotted screwdriver. These fasteners are spring loaded to keep them in tension and resist loosening under vibration. Dzus fasteners that are custom CNC machined are ideal for applications where panels will be removed and replaced repeatedly without damaging the joints.
CNC Manufacturing: Bar Stock to Stud
KEY-CNC CNC makes Dzus fastener studs and receptacles in many steps. CNC turning shapes the stud body from solid bar material, generating the head, shank, and cam groove geometry in one chucking for coaxiality. The helical cam slot, the most important factor in locking performance and cycle life, is precision-milled to contact the spring wire smoothly over thousands of operations.
CNC machining and stamping are combined for receptacles and grommets depending on volume and material. Complex geometries are handled by our 3-, 4-, and 5-axis CNC centres, while thread rolling, deburring, and surface treatment are done in-house. Our comprehensive approach from raw material to completed fastener allows us to produce custom CNC machined Dzus fasteners with consistent quality at prototype and production levels in 10–15 working days.
Performance Environment Material Selection
Material choice greatly affects Dzus fastener performance. KEY-CNC uses engineering materials for specific working conditions:
Carbon Steel (SAE 1045): coated with cadmium or zinc-nickel for corrosion resistance. The typical cost-effective solution for general-purpose and motorsport applications.
304/316 Stainless Steel - Ideal for marine, medicinal, and food-processing settings requiring corrosion resistance. SS316 is specified for seawater exposure and chemical washdown locations.
Grade 5 Titanium (Ti-6Al-4V) is ideal for primary weight reduction. Titanium Dzus studs have a self-healing oxide layer that avoids galvanic corrosion against aluminium and carbon fibre surfaces and are 45% lighter than heat-treated steel.
For non-structural applications, aluminium (6061-T6 / 7075-T6) is ideal for weight-sensitive applications. To identify assembled panels, anodized in various colours.
Every order includes material certification, PMI verification, and batch traceability, per ISO 9001:2015.
Customization & Ordering
KEY-CNC supports full customization of Dzus fasteners to your specifications:
Head styles: Wing, flush, oval, button, or custom designs per your drawing
Stud lengths: Configured to your panel stack-up thickness for proper engagement
Body diameters: Standard sizes or fully custom per specification
Surface finishes: Anodizing, passivation, zinc-nickel plating, black oxide, electropolishing
MOQ: Prototype quantities accepted
To request a quote, provide your drawings or specifications including stud dimensions, material grade, quantity, and application details. Drawings in STEP, DWG, or PDF format are preferred. Typical lead time is 10–15 working days, with prototype samples available for design verification and fit testing before mass production.
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