Confirmat Screw

Product Introduction

• Standard Name: Confirmat Screw (Three-in-One Connection Screw).

• Common Chinese Names: Three-in-One Screw, Eccentric Connection Screw, Combination Screw.

• Product Definition: A specialized screw designed for the “three-in-one” connection system used in panel furniture (e.g., wardrobes, cabinets). Its structural features include a drill-guiding tip, specially designed threads, an extended threadless shaft, and a cross-slotted head. It requires use with a pre-embedded nut and an eccentric wheel to form a quick, secure, and reusable hidden right-angle connection.

Confirmat Screw Key Features

• Coarse Threads and Large Diameter: Sparse and deep threads, thicker shank (commonly 5-7mm),

  blunt end design, suitable for the middle layer of compression-fit particleboard, providing strong grip.

• Shoulder Structure: Unthreaded shoulder below the head helps with positioning and prevents board

  cracking; the head is usually flat or barrel-shaped for easy countersunk installation.

• Drive Type: Commonly Pozi (PZ) cross-head or internal hexagonal drive for high torque actuation.

• Material and Coating: Commonly zinc-plated steel (ZP) for basic rust protection; common length

  40-70mm, diameter 5-7mm.

• Advantages: Can be repeatedly disassembled and reassembled dozens of times without damaging

  the hole, high connection strength, economical for RTA furniture.

Working Principle

• Pre-drilling Stepped Holes: Drilling holes using a special step drill bit (countersunk head + shoulder

  clearing + threaded guide hole) to ensure alignment.

• Compression Engagement: Upon screwing, the coarse thread compresses the particleboard material,

  forming thread grooves (non-cutting), while the blunt end prevents damage to the board.

• Preload Generation: The shoulder locks in place, generating axial clamping force. Stress is distributed

  across the shoulder and coarse thread to prevent loosening.

• Repeatability: Compression threads allow for multiple assembly and disassembly without damaging the

  hole walls; the principle involves material deformation and frictional gripping.

Product Applications

• RTA Furniture: Quick-connect particleboard/MDF for flat-mounted furniture such as bookcases,

  tables, chairs, or cabinets.

• Cabinet Manufacturing: Vertical or edge-connecting of boards for kitchen cabinets, wardrobes,

  or office furniture.

• Woodworking Projects: Repairing or assembling composite board furniture, providing stable joints.

• Industrial Production: Mass furniture assembly, suitable for glueless joints.

• DIY Repair: Economical and reliable for connecting engineered wood products in home projects.