Pan head oil plug screw

冷镦加工是一种少切削或无切削的压力加工新工艺
金屬。它是一種利用金屬在下列因素作用下產生塑性變形的加工方法
外力作用下，在模具的幫助下，重新分配和轉移金屬的體積，以形成
所需的零件或坯料。冷镦工艺最适合生产标准的
螺栓、螺絲、螺帽、鉚釘和銷等緊固件

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.) 或 imperial (UNC/UNF) threads.

   • May include tapered threads (NPT) 或 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:

   • 鋼材 (carbon or alloy), 不銹鋼 (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).