Hexagon socket oil plug screw

冷間圧造加工は、切削の少ない、あるいは切削を必要としない新しい圧造加工のひとつである。
金属。の作用による金属の塑性変形を利用した加工法である。
外力を受け、金型の助けを借りて、金属の体積を再分配し、移動させる。
必要な部品やブランクを製造します。冷間圧造工程は、標準的な
ボルト、ネジ、ナット、リベット、ピンなどの留め具。

A Hexagon socket oil plug screw, commonly known as a hex plug, Allen plug, or socket head plug, is a type of threaded fastener used to seal or close off a threaded opening, typically in machinery, hydraulic systems, or plumbing applications.

Key Characteristics:

1. Hexagonal Socket Drive:

   • Has a six-sided internal recess for secure engagement with an Allen wrench or hex driver.

   • Allows for high torque application without cam-out (unlike Phillips or slotted screws).

2. Threaded Body:

   • Made with external threads (metric, UNC, UNF, NPT, BSP, etc.) to match the threaded port.

   • Some have tapered threads (NPT/NPTF) for a pressure-tight seal, while others use straight threads with a sealing washer or O-ring.

3. Materials & Finishes:

   • Common materials: Carbon steel, stainless steel, brass, aluminum, or nylon.

   • Coatings: Zinc plating, black oxide, anodizing, or PTFE coating for corrosion resistance.

4. Sealing Mechanism:

   • May include an integrated O-ring, copper washer, or bonded seal for leak-proofing.

   • Some rely on thread sealant (Teflon tape, Loctite) for additional sealing.

   • Hexagon socket oil plug screw

5. Head Styles:

   • Flush head (countersunk for a smooth surface).

   • Raised head (protrudes slightly for easier access).

   • Vented head (with a small hole for pressure equalization).

一般的な用途：

• Sealing hydraulic/pneumatic ports, gearboxes, engine blocks, and fluid reservoirs.

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

• Providing access points for maintenance in machinery.

Variants:

• O-Ring Hex Plug (with built-in rubber or Viton seal).

• Metric/Inch Hex Plug (thread size variations).

• Magnetic Hex Plug (captures metal debris in oil systems).