Chicago Screws Black Galvanized

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

Chicago Screws Black Galvanized are heavy-duty, corrosion-resistant fasteners designed for structural and outdoor applications where strength and durability are critical. They combine the rust-resistant properties of galvanization with a black oxide or phosphate finish for enhanced protection and a sleek appearance.

Key Characteristics:

2. Head Design

• Chicago Head (Hex Washer Head):

  • Low-profile hexagonal head with an integrated washer face.

  • Distributes clamping force evenly, reducing material damage.

  • Prevents cam-out (slipping) when used with power tools.

Advantages Over Standard Screws

✅ Dual Protection: Galvanized + black oxide resists rust longer than plain zinc screws.
✅ Stronger Grip: Chicago head prevents stripping under high torque.

Final Verdict:

Chicago Black Galvanized Screws are the go-to choice for contractors and DIYers needing a durable, weather-resistant fastener with a professional look. Whether for metal framing, outdoor builds, or heavy-load applications, they outperform standard screws in both strength and longevity.

1. Head Style:

   • Chicago (or “hex washer”) head – a low-profile hexagonal head with a built-in washer face for better load distribution and grip.

   • Designed to prevent stripping when driving with a power drill or impact driver.

應用：

• Metal stud framing (drywall, HVAC, roofing).

• Attaching wood to metal (e.g., decking, fencing).

• Automotive and machinery assembly.

• General construction where corrosion resistance is needed.

These screws are ideal for projects requiring both aesthetic appeal (black finish) and long-term weather resistance.