Socket Set Screw with Cup point (UNF)

Socket Set Screw with Cup Point (UNF), also known as UNF Cup Point Socket Set Screw, UNF Grub Screw, Inch Fine Thread Cup Point Set Screw, Imperial Fine Thread Grub Screw, Allen Set Screw UNF or Hex Socket Set Screw with Cup Point UNF, is an inch / imperial fine thread headless fastener with an internal hexagon socket drive and a cup-shaped point at the end. It is commonly used to lock, hold, secure or position one component against another without using a traditional screw head.

Unlike normal cap screws, socket set screws do not have an external head. They are tightened into a threaded hole using an Allen key or hex key. The cup point is one of the most common point styles because the rim of the cup point can bite into the mating surface, helping to provide strong holding power in selected shaft, collar, pulley, gear, sprocket, coupling and machinery applications.

Socket Set Screw with Cup Point (UNF) is suitable for inch / imperial fine thread applications where UNF thread is required. It is commonly used in imported machinery, American standard equipment, hydraulic components, automotive-light assemblies, pulleys, gears, collars, sprockets, couplings, hubs, knobs, handles, fixtures, jigs, motors, pumps, gearboxes and industrial maintenance applications.

Material :

• Steel

Finishing :

• Steel comes in Black Oxide Finishing

Dimensions:

Key Features:

• UNF socket set screw with cup point for inch / imperial fine thread applications
• Also known as UNF grub screw, inch fine thread cup point set screw, Allen set screw UNF or hex socket set screw with cup point UNF
• Headless design allows the screw to sit inside or below the threaded hole surface
• Internal hexagon socket drive for Allen key / hex key installation
• Cup point helps bite into the mating surface for strong holding in selected applications
• UNF fine thread provides closer thread spacing compared with UNC coarse thread
• Suitable for imported machinery, American standard equipment and inch fine thread replacement work
• Useful for shafts, collars, pulleys, gears, sprockets, hubs, knobs, handles and couplings
• Suitable for hidden fastening, shaft locking, component positioning and anti-slip holding
• Steel material suitable for machinery, tooling and industrial fastening applications
• Steel comes in Black Oxide Finishing
• Practical for maintenance, repair, replacement, production assembly and project supply

Applications:

Socket Set Screw with Cup Point (UNF) is commonly used in:

• Inch / imperial fine threaded hole applications
• Imported machinery repair and replacement
• American standard equipment maintenance
• Hydraulic component fastening
• Automotive-light mechanical assemblies
• Shaft locking and component positioning
• Pulley and gear fixing
• Sprocket and collar fastening
• Coupling and hub locking
• Knob, handle and lever fixing
• Jig and fixture positioning
• Machinery assembly and maintenance
• Automation equipment assembly
• Motor, pump and gearbox repair
• Factory maintenance and MRO work
• General commercial and industrial fastening applications

Common Related Names

UNF Cup Point Socket Set Screw

• A technical name for an inch fine thread headless socket screw with cup point.

UNF Grub Screw

• A common workshop and maintenance name, especially when used to lock parts onto shafts.

Inch Fine Thread Cup Point Set Screw

• Used when customers need non-metric fine thread set screws for imperial thread applications.

Allen Set Screw UNF

• A practical trade name because the screw is installed using an Allen key and has UNF fine thread.

Hex Socket Set Screw with Cup Point UNF

• A detailed name that describes the internal hex socket drive, cup point and UNF thread.

Why Choose Our Socket Set Screw with Cup Point (UNF)

Choosing the correct Socket Set Screw with Cup Point (UNF) is important for thread fitment, holding strength, point contact, drive engagement and long-term assembly reliability. The screw should match the UNF thread size, threads per inch, length, material, finishing, hex socket size, mating threaded hole, shaft material, tightening torque and working environment.

Steel Socket Set Screw with Cup Point (UNF) with Black Oxide Finishing is a practical option for general machinery, indoor equipment, pulleys, collars, gears, sprockets, couplings, knobs, handles, jigs, fixtures, imported machinery repair, hydraulic equipment, automotive-light components and industrial maintenance applications.

UNF thread is important when the existing part follows inch / imperial fine thread instead of metric thread or UNC coarse thread. It is commonly required for imported machinery, American standard equipment, older machines, hydraulic components, automotive-light parts, replacement components and maintenance work where the tapped hole, pulley, hub, collar or coupling is already made with UNF thread.

The cup point design is useful because the edge of the cup point can press into the mating surface and improve holding power in selected assemblies. It is commonly selected for shaft-mounted parts, rotating components, collars, hubs and mechanical positioning applications where a firm grip is required.

Compared with UNC thread, UNF fine thread has closer thread spacing. This can be useful for more controlled adjustment, better thread engagement in selected applications and fine-thread replacement work. A UNF set screw cannot be forced into UNC coarse thread or metric thread holes, even if the diameter looks similar.

Compared with flat point set screws, cup point set screws can provide stronger bite, but they may leave a mark on the shaft or mating surface. Compared with cone point set screws, cup point set screws are commonly selected for general holding and shaft locking, while cone point screws are more aggressive for positive location.

UNF set screws must be matched carefully with the correct thread size and threads per inch. Using the wrong thread standard can damage the mating thread and cause poor fastening performance.

For best performance, the screw should be tightened using the correct Allen key size and suitable torque. For high-speed rotating, high-load, safety-related, vibration-prone or critical machinery assemblies, screw size, thread engagement, point contact, shaft hardness, torque value and joint design should be checked by a qualified person or project specification.

We supply Socket Set Screw with Cup Point (UNF) for machinery users, factories, maintenance departments, imported equipment repair teams, hydraulic service teams, automation machine builders, tooling workshops, mould and die users, jig and fixture makers, equipment manufacturers, metal fabricators, motor repair teams, pump service teams, gearbox service users, automotive-light repair users, workshop users, hardware resellers and industrial customers in Selangor, Kuala Lumpur and across Malaysia, including Klang, Shah Alam, Puchong, Petaling Jaya, Subang, Port Klang, Balakong, Cheras, Kajang, Rawang, Semenyih, Ampang, Banting, Putrajaya, Cyberjaya and Seremban.