Dog Point Hexagon Socket Brass Tip Set Screws 12.9 Grade Brass Tipped Grub Screw

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What Are Brass Tip Set Screws?

Brass tip set screws are specialized fasteners designed to secure one object within or against another without protruding. Unlike standard set screws, they feature a brass tip at the pressing end, which provides a softer contact surface to prevent damage to the mating part. These screws are commonly used in applications where marring or deformation of the secured component must be avoided.

Materials

The primary materials used in brass tip set screws include:

• Body: Typically made from hardened steel (such as carbon steel or alloy steel) for strength and durability.

• Tip: Composed of brass (usually lead-free or free-machining brass) to ensure a non-marring, corrosion-resistant contact point.

Surface Treatments

To enhance performance and longevity, brass tip set screws may undergo various surface treatments, such as:

• Zinc Plating: Provides corrosion resistance and a shiny finish.

• Black Oxide: Offers a dark, corrosion-resistant coating with reduced reflectivity.

• Nickel Plating: Improves wear resistance and provides a polished appearance.

• Passivation (for stainless steel bodies): Removes free iron particles to enhance corrosion resistance.

Specifications

Brass tip set screws are available in multiple configurations, including:

• Drive Types: Hex socket (Allen), slotted, or Torx.

• Thread Types: Metric (M3, M4, M5, etc.) or imperial (#4-40, #6-32, #8-32, etc.).

• Point Styles: Cup point, flat point, or cone point (with the brass tip integrated).

• Lengths & Diameters: Varying from small (M2) to larger sizes (M12 or above), depending on application needs.

Applications

Brass tip set screws are widely used in industries where precision and surface protection are critical, including:

• Optics & Precision Instruments: Securing lenses and delicate components without scratching.

• Electronics: Fastening sensitive circuit boards or connectors.

• Aerospace & Automotive: Holding lightweight or soft-metal parts in place.

• Medical Devices: Ensuring secure yet non-damaging fastening in surgical tools.

• Furniture & Fixtures: Adjusting hinges or fittings without leaving marks.

Excellent Case: Securing Camera Lens Mounts

Scenario:

A high-end camera manufacturer needed a reliable way to secure interchangeable lenses without risking damage to the precision-machined aluminum lens mounts. Traditional steel set screws could scratch or deform the mounting surface over time, leading to misalignment and reduced optical performance.

Solution:

The company switched to brass tip set screws with the following specifications:

• Material: Alloy steel body with a lead-free brass tip.

• Surface Treatment: Black oxide for corrosion resistance and reduced glare.

• Drive Type: Hex socket for secure tightening with an Allen key.

• Thread & Size: M4 x 0.7mm, 6mm length.

Outcome:

• No Surface Damage: The brass tip prevented scratches on the aluminum mount, ensuring smooth lens changes.

• Secure Hold: The hardened steel body provided strong clamping force without loosening.

• Longevity: The black oxide coating resisted corrosion in humid environments.

This application demonstrated how brass tip set screws provide the perfect balance between strength and surface protection in precision assemblies.

Conclusion

Brass tip set screws are indispensable in applications requiring secure fastening without surface damage. Their combination of a hardened steel body and a soft brass tip makes them ideal for optics, electronics, medical devices, and more. By selecting the right material, coating, and specifications, engineers can ensure both reliability and longevity in critical assemblies.