Ingco ST3.5x25mm Yellow Zinc Chipboard Screws (HWBS3502511) – 250-Piece Bulk Bottle Pack High-Performance Heat-Treated Countersunk Wood Fasteners

Achieve flush, dependable fastening in timber, particleboard, and composite woods with the professional-grade engineering of the INGCO HWBS3502511 Chipboard Screw Pack. Featuring a precise ST3.5 gauge thread diameter and a compact 25mm length profile, these premium wood fasteners are specifically designed for rapid installation and clean wood-to-wood or hardware-to-wood joints. Packed in a convenient, reusable bulk storage bottle containing 250 pieces, this kit provides carpentry contractors, cabinet makers, and DIY woodworkers with a reliable, high-volume fastening solution for cabinetry, furniture assembly, and hinge installation.

Forged from premium steel, these screws undergo an advanced heat-treatment process to drastically increase their structural hardness and shear resistance, preventing the heads from snapping under high torque. The countersunk (CSK) head design is paired with a specialized Pozi drive recess, which minimizes driver slip (cam-out) and ensures clean, flat surface integration. Finished with a yellow zinc plating, these screws are highly guarded against rust and oxidation while blending seamlessly with natural wood tones.

Key Technical Features:

• Model: HWBS3502511

• Screw Dimensions: ST3.5 Thread Gauge Diameter x 25mm Total Length – Optimized for rapid, clean timber embedding in medium-to-thin panel applications

• Quantity Configuration: 250 Pieces supplied in a heavy-duty, reusable bulk storage bottle for easy organization and spill prevention

• Drive Type: Precision Pozi Drive – Offers superior grip and high-torque transfer compared to standard Phillips drives

• Head Style: Countersunk (CSK) Head – Sinks flush into workpieces to deliver a smooth, clean surface finish without snagging

• Metallurgical Treatment: Advanced Heat Treatment – Enhances core structural strength and flexibility to resist snapping under stress

• Surface Coating: Premium Yellow Zinc Plated Finish – Provides robust defense against moisture, rust, and industrial corrosion

• Thread Pattern: Deep, sharp wood-cutting threads that bite quickly into materials to reduce wood splitting and lower driving friction

• Packaging Layout: Neatly stored inside a clear, space-saving desktop container bottle with a secure lid for rapid jobsite access

• Application Range: Highly optimized for fastening medium-density fiberboard (MDF), softwoods, hardwoods, chipboards, plywood sheets, cabinet frames, hinges, brackets, drawer slides, and general timber layouts