Dense Board Screw Black Phos

This 3.9mm x 55mm Dense Board Screw in Black Phosphate finish is the longest option in the range, designed for applications requiring maximum penetration depth and holding power. The 55mm length makes it particularly well suited to fixing thicker MDF, particleboard, and composite wood panels where a longer, more secure fixing is essential — ideal for structural joinery, shelving, and heavy-duty furniture assembly.

The black phosphate coating provides superior corrosion resistance and a refined, professional finish, whilst facilitating smooth insertion without material damage. Sold in a bulk pack of 1000, this size is a go-to choice for demanding trade applications.

Features and Benefits:
• Phillips No.2 recess for a positive drive
• Reduced countersunk head for improved countersinking into dense board
• High-Low thread for increased pull-out value into both timber and thin sheet metal
• Coarse thread for extreme hold
• 25° super sharp point for ease of penetration

Specifications:
Diameter: 3.9mm
Length: 55mm
Thread Length: 50mm
Finish: Black Phosphate
Pack Quantity: 1000

Contents:
• Pack of 1000