1/4”-20 X 3” Oval Head Screws Self Tapping Screw Countersunk Head Oval Machine Screw

توضیحات

What Are Oval Head Screws?

Oval head screws are a type of machine screw or wood screw with a smooth, rounded top and a tapered underside. The oval-shaped head provides a decorative, low-profile finish while allowing the screw to sit slightly countersunk into the material. They are commonly used when a flush or semi-flush appearance is desired without sharp edges.

Materials of Oval Head Screws

1. Steel (Carbon steel, Stainless steel) – High strength, corrosion-resistant (stainless steel for outdoor/marine use).

2. Aluminum – Lightweight, corrosion-resistant (used in aerospace and electronics).

3. Brass – Decorative, corrosion-resistant (common in marine and architectural hardware).

4. Titanium – High strength-to-weight ratio (used in aerospace and medical devices).

Surface Treatments

1. Zinc Plating – Standard corrosion protection for steel screws.

2. Black Oxide – Improves wear resistance and provides a sleek finish.

3. Nickel/Chrome Plating – Decorative and corrosion-resistant (used in furniture and automotive trim).

4. Anodizing (for aluminum/titanium) – Enhances durability and color options.

5. Passivation (for stainless steel) – Removes free iron and improves rust resistance.

Specifications

• Drive Type: Phillips, Slotted, Torx, or Hex.

• Thread Type: Machine thread (e.g., M3, M4, #6-32, #8-32) or wood thread (coarse/fine).

• Head Diameter: Typically 1.5x to 2x the shank diameter.

• Length: Ranges from 6mm to 100mm, depending on application.

Applications

• Furniture Assembly: Provides a smooth, decorative finish (e.g., cabinets, upholstery).

• Automotive Trim: Secures interior panels and exterior moldings without sharp edges.

• Electronics: Used in devices where low-profile fasteners are needed (e.g., control panels).

• Marine Hardware: Stainless steel or brass screws resist saltwater corrosion.

• Aerospace: Titanium screws reduce weight while maintaining strength.

Excellent Case: Luxury Yacht Interior Paneling

Scenario: A yacht manufacturer needs to attach teak wood panels to aluminum frames without visible screw heads or sharp edges that could snag fabrics or injure passengers.

Solution:

1. Material Choice: Stainless steel oval head screws (marine-grade, corrosion-resistant).

2. Installation:

   • Pilot holes are drilled, and screws are driven until the oval heads sit flush with the wood surface.

   • The tapered underside countersinks slightly, creating a smooth, polished look.

3. Result:

   • Panels remain securely fastened even in humid, salty conditions.

   • Screw heads blend seamlessly with the wood, enhancing aesthetics.

Benefits:
✔ Aesthetic appeal – Provides a sleek, high-end finish.
✔ Safety – No protruding edges to cause injuries.
✔ Durability – Stainless steel resists rust in marine environments.