Hexalobular socket oil plug screw

Cold heading process is one of the new processes for pressure machining of less or no cutting
metal. It is a processing method that utilizes the plastic deformation of metal under the action of
external forces, and with the aid of molds, redistributes and transfers the volume of metal to form
the required parts or blanks. The cold heading process is most suitable for producing standard
fasteners such as bolts, screws, nuts, rivets, and pins.etc

Hexagon Socket Head Cap Screw – Overall Description

A Hexalobular socket oil plug screw (SHCS), commonly referred to as an Allen screw or socket head screw, is a high-strength fastener designed for precision applications where a flush or low-profile head is required. It features a cylindrical head with an internal hexagonal drive (socket) that requires a hex key (Allen wrench) or a hex bit for installation.

Key Characteristics:

1. Head Design:

   • Cylindrical shape with a flat top and chamfered edges.

   • Provides a low-profile and smooth surface, reducing interference in tight spaces.

2. Drive Type:

   • Internal hexagon (hex socket) for secure engagement with an Allen key or hex driver.

   • Prevents cam-out (slipping) compared to Phillips or slotted drives.

3. Thread Configuration:

   • Available in fully threaded or partially threaded (with an unthreaded shoulder) variants.

   • Threads conform to metric (ISO) or imperial (UNC/UNF) standards.

4. Materials & Finishes:

   • Common Materials:

     • Carbon steel (Grade 8.8, 10.9, 12.9)

     • Stainless steel (A2/A4 – corrosion-resistant)

     • Titanium (lightweight, high strength)

     • Alloy steel (heat-treated for extreme conditions)

     • Hexalobular socket oil plug screw

   • Common Finishes:

     • Black oxide (mild corrosion resistance)

     • Zinc plating (enhanced corrosion protection)

     • Anodized (for aluminum screws)

     • Plain/uncoated (for machining applications)

Common Applications:

• Machinery & Automotive (engine parts, gearboxes, fixtures)

• Aerospace & Defense (high-stress assemblies)

• Electronics & Robotics (compact, precision devices)

• Medical Equipment (sterile, high-reliability fastening)

• DIY & Furniture (discreet, strong fastening)

Sizing & Dimensions:

• Metric Sizes: M2, M3, M4, M5, M6, M8, M10, M12, etc.

• Imperial Sizes: #4-40, #6-32, #8-32, 1/4″-20, 5/16″-18, 3/8″-16, etc.

• Lengths: Vary from a few millimeters to several inches.

Installation Tips:

• Use a properly sized Allen key to avoid rounding the socket.

• Apply thread-locking compound (e.g., Loctite) for vibration resistance.

• Follow recommended torque values to prevent over-tightening.