Window Handle Screws, manufactured by Celebrite Fasteners Co., Ltd, are designed for exceptional performance. Available in M3.9/#7 size with lengths ranging from 9.5mm to 75mm, these screws are made using high-quality Carbon Steel or Stainless Steel, ensuring durability and reliability.

Featuring drill point and sharp point options, along with attachment choices, including with or without wings, these screws offer versatility for various applications.

The surface treatment options such as Zinc plated, Yellow Zinc plated, Black zinc, Zinc Nickel, Mechanical Galvanized, and Ruspert ensure enhanced corrosion resistance. Meeting DIN, IFI, and JIS standards, Window Handle Screws are packaged conveniently in bulk, box, bag, or blister formats. 

Description:
- Size : M3.9 / #7
- Length: 9.5mm~75mm
- Material: Carbon Steel / Stainless Steel
- Point type: Drill point and sharp point
- Attachment: W/WO Wing
- Surface Treatment: Zinc plated, Yellow Zinc plated, Black zinc, Zinc Nickel, Mechanical Galvanized, Ruspert, and Slat Spray Test according to customer requirement.
- Standard: DIN, IFI, JIS, according to the customer's drawing
- Package: Bulk packing, Box packing, Bag packing, Blister

Flat-head window screw characteristic: The advantage of a flat head is that it can drill the whole head into an object, and the head of the screw doesn't protrude from the object. It is normally used to contact an object's fastener face and smooth the object's surface.

Flat head window screws are used in window construction, considering in appearance, often uses flat head type to make the head of the screw will not protrude on the object.