Pan head 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

Pan Head Oil Plug Screw – Overview

A pan head oil plug screw is a threaded fastener designed to seal oil ports, drain holes, or fluid reservoirs in mechanical systems. It features a domed (pan-shaped) head with an external drive (typically slotted, Phillips, or hex) and a threaded body for secure installation.

Key Features & Characteristics

1. Head Design:

   • Pan head (low-profile, rounded top with flat bearing surface).

   • Provides a slight protrusion for easy tool access while maintaining a smooth contour.

2. Drive Types:

   • Slotted (flat-head screwdriver).

   • Phillips (cross-head screwdriver).

   • Hex socket (Allen) (less common but used for higher torque).

3. Thread Type:

   • Metric (M6, M8, etc.) or imperial (UNC/UNF) threads.

   • May include tapered threads (NPT) or straight threads with sealing features.

4. Sealing Mechanism:

   • Often paired with an integrated washer, O-ring, or copper gasket to prevent oil leaks.

   • Some designs rely on thread sealant (e.g., Teflon tape).

5. Materials & Coatings:

   • Steel (carbon or alloy), stainless steel (corrosion-resistant), or brass (for non-sparking applications).

   • Coatings: Zinc-plated, black oxide, or PTFE-coated for durability.

   • Pan head oil plug screw.

Common Applications

• Sealing engine oil pans, gearboxes, hydraulic systems, and differential housings.

• Acting as drain/fill plugs in automotive and industrial equipment.

• Used where a low-profile head is preferred over hex bolts or flanged plugs.

Variants

• Slotted pan head plug (basic, tool-simple).

• Phillips pan head oil plug (common in consumer machinery).

• O-ring pan head screw plug (integrated seal for better leak prevention).