Timco 3.9 x 38mm Window Fabrication Screws Countersunk Phillips 125Y

Fast-Track Your Fabrication

When your PVCu window profiles contain internal steel or aluminium reinforcements for added rigidity, attaching hinges and locks can severely slow down your assembly line if you have to pre-drill every hole. The TIMCO self-drilling fabrication screw completely bypasses this step. Equipped with an aggressive, hardened self-drilling point, it features a Maximum Drilling Thickness (MDT) of 2.5mm. This allows you to drive the screw straight through the plastic outer layer and directly into the metal core in one fluid motion, saving valuable seconds on every single fixing.

Extended Reach for Maximum Security

While shorter screws are great for lightweight keeps, mounting heavy-duty friction stays or deeply recessed locking mechanisms often requires a fastener with more reach. At 38mm long, this specific screw is engineered to bridge wider gaps and anchor deeply into the frame's metal reinforcement. Because the shank is fully threaded from tip to head, it provides exceptional grip and pull-out resistance across multiple layers of material, ensuring your heavy window components remain totally secure over years of daily use.

Yellow Zinc Protection and Aesthetics

Manufactured from high-strength carbon steel, these screws are built for the rigorous demands of impact drivers and automated fabrication machinery. To protect the steel core, they are treated with a Yellow Zinc finish. This coating achieves a Corrosion Rating of 2, providing the exact level of protection required for the sheltered, occasionally damp environments found inside window rebates. Furthermore, the yellow passivation is an excellent aesthetic match for fabricators working with brass-coloured or similarly passivated window hardware, maintaining a consistent, professional look across the finished product.

Key Features

• Built-In Drill Point: Acts as its own drill bit to slice through internal steel and aluminium reinforcements, drastically reducing assembly time.
• Fully Threaded: Self-tapping threads run the entire 38mm length of the shank, maximizing pull-out resistance inside the frame.
• Phillips (PH2) Drive: The deep cross-recess ensures positive bit engagement, preventing slippage (cam-out) during high-speed, high-torque installations.
• Durable Carbon Steel: Hardened construction ensures the screw can withstand the intense rotational pressure required to pierce metal substrates.
• Corrosion Rating 2: The Yellow Zinc plating offers reliable protection against rust in occasionally damp, rural, or sheltered indoor/rebate environments.
• Bulk Trade Pack: Supplied in a heavy-duty box of 1000 pieces (weighing 2.51kg), providing incredible value and volume for busy workshops.