DIN914 304 Stainless Steel Hex Socket Cone Point Set Screw Assortment – M3–M10

DIN914 cone point set screws (grub screws) provide the highest holding force of any set screw point style — the sharp cone tip penetrates into a pre-drilled conical dimple in the shaft, creating a positive mechanical lock that resists both axial and rotational movement. The 304 stainless steel construction provides corrosion resistance for outdoor, marine, and food-contact applications where carbon steel set screws would corrode. High-hardness treatment (HRC 45–50) ensures the cone tip maintains its geometry under load.

Key Specifications

• Standard: DIN914 / ISO 4027 (hex socket cone point set screw)
• Material: 304 stainless steel (A2), high-hardness treated
• Drive: Internal hex (Allen key)
• Point Style: Cone point — sharp conical tip for dimple engagement
• Sizes: M3, M4, M5, M6, M8, M10 (multiple lengths per size)
• Thread: Metric coarse pitch
• Hex Key Sizes: M3=1.5mm, M4=2mm, M5=2.5mm, M6=3mm, M8=4mm, M10=5mm
• Hardness: HRC 45–50 (high-hardness A2 stainless)

Cone Point vs Cup Point vs Flat Point — When to Use Cone Point

• Cone point (DIN914, this product): Highest holding force. Requires a pre-drilled conical dimple in the shaft. Permanent or semi-permanent applications. The cone tip locks into the dimple, providing positive axial and rotational retention. Cannot be repositioned without re-drilling a new dimple. Use for: precision indexing, permanent shaft-to-hub locking, applications subject to high vibration or shock loads.
• Cup point (DIN916): Moderate holding force. Bites into the shaft surface without a pre-drilled dimple. General-purpose set screw for most applications. Allows repositioning with minor shaft marking.
• Flat point (DIN913): Lowest holding force. No shaft penetration. For hardened shafts, polished surfaces, and applications requiring frequent repositioning without shaft damage.
• Dog point (DIN915): Cylindrical stub locates in a drilled hole. Positive angular and axial location without shaft damage. For precision indexing and removable connections.

How to Install a Cone Point Set Screw Correctly

1. Mark the shaft at the desired locking position
2. Drill a conical dimple using a center drill or countersink bit — the dimple angle should match the cone point angle (typically 90° included angle)
3. Position the hub/collar at the correct location on the shaft
4. Thread the cone point set screw into the hub until the tip contacts the dimple
5. Tighten to the specified torque — the cone tip seats into the dimple, locking the hub axially and rotationally
6. Apply thread-locking compound (e.g., Loctite 243) if vibration resistance is required

What Questions Does This Product Answer?

• "Why use a cone point set screw instead of a cup point?" — Cone point provides significantly higher holding force because the tip engages a pre-drilled dimple, creating a positive mechanical lock rather than relying on friction alone. For applications subject to vibration, shock, or high torque, cone point is the correct choice.
• "Can I use a cone point set screw without drilling a dimple?" — Technically yes, but the cone tip will simply mark the shaft surface without engaging a dimple, providing no more holding force than a cup point. The cone point’s advantage is only realized when used with a matching conical dimple.
• "Is 304 stainless steel hard enough for set screws?" — Standard 304 stainless (A2-70) is too soft for set screws — the tip deforms under load. This product uses high-hardness treated 304 stainless (HRC 45–50), which provides adequate hardness for set screw applications while maintaining corrosion resistance.
• "What torque should I use for M6 cone point set screws?" — M6 DIN914 stainless: 6–8 Nm. Always use a calibrated torque wrench or torque-limiting hex key. Over-torquing shears the screw; under-torquing allows the cone tip to back out of the dimple under load.

Typical Applications

• Precision machinery: Permanent shaft-to-hub locking on gears, pulleys, and couplings
• Marine & outdoor: Corrosion-resistant shaft locking on marine hardware, outdoor equipment, and food processing machinery
• Robotics: Servo output shaft locking, encoder disc positioning, actuator coupling
• CNC & machining: Toolholder locking, fixture positioning, precision indexing
• Automotive: Steering column components, throttle body shaft locking, sensor wheel positioning

Package Contents

Assortment kit — M3–M10 DIN914 cone point set screws in 304 stainless steel, multiple lengths per size, in labeled storage case.