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The Unifix SAE Grade 5 UNF Hexagon Setscrews are engineered for professionals and hobbyists who require high-tensile fasteners for demanding mechanical assemblies. These screws offer superior structural integrity and corrosion resistance, making them a reliable choice for heavy-duty applications where secure fastening is critical. Note that because these use the Unified Fine (UNF) thread standard, they are not compatible with standard metric or coarse-threaded hardware, necessitating precise matching before installation.
| Colour | Silver |
|---|---|
| Model Part Number | 5014196309156 |
| Brand | Unifix |
It is a standard indicating that the steel has been heat-treated to achieve a specific high tensile strength and hardness level.
No. These are UNF (Unified Fine) thread fasteners and are not compatible with metric nuts or bolts.
A standard wrench or socket set matching the hexagon head size is required.
They feature a corrosion-resistant finish, but for extreme or marine environments, additional protective coatings or stainless steel options may be preferred.
Fine threads offer a higher thread engagement area and are generally more resistant to vibrating loose.
Verify that the thread pitch and diameter match perfectly. Do not force, as UNF threads are easily stripped if cross-threaded.
Ensure you are using the correct size socket or wrench and that it is fully seated on the hexagonal head to distribute force evenly.
Before installation, verify that your tapped hole or mating nut is specifically threaded for the size and pitch of your setscrew (e.g., 3/8-24 UNF). Never force a screw into a hole if it does not thread smoothly by hand, as this can damage the fine threads. For maximum security, use a calibrated torque wrench to ensure the fastener is tightened to the manufacturer's recommended specification for the assembly. Periodically check fasteners in high-vibration equipment to ensure they remain snug. Store in a dry, cool location to maintain the integrity of the corrosion-resistant finish.
