Chicago Flat Head Steel Cross Lock Screw Knocking Splint Nut Combination Connection Furniture Lock Nail with Knurled Belt Pad

A Chicago screw, also widely known as binding screw, barrel screw, or sex bolt, is a two-piece detachable locking fastener system. It consists of a male threaded stud and a female threaded barrel socket. Unlike ordinary one-way self-tapping screws or rivets, it adopts a through-hole assembly and mutual thread locking structure, enabling reusable assembly and disassembly. It features a flush, neat surface after installation, no protruding sharp edges, and is widely used for decorative and flexible connection scenarios that require repeated disassembly and maintenance.

Chicago screws have irreplaceable practical advantages for specialized connection scenarios, with three verified core strengths:

• Reusable & Detachable: Traditional rivets are permanently fixed and non-removable, while ordinary wood/self-tapping screws easily damage base material threads after repeated disassembly. Chicago screws support countless disassembly and re-locking without damaging materials, ideal for products requiring replacement and maintenance.
• Flush & Aesthetic Surface: The integrated cylindrical head design fits tightly with the mounting surface, achieving a fully flat installation effect. No exposed screw heads or concave holes, ensuring a neat and high-grade appearance for decorative products.
• Stable Locking & Anti-loosening: The full-fit internal and external thread structure provides uniform locking force. It avoids loosening caused by vibration or material extrusion, delivering more stable connection performance than ordinary cross recess screws in decorative and flexible material fastening.

We provide full customizable mainstream styles to meet diverse market and installation needs:

Head Types: Flat head, round head, cylindrical head, hex head (covers decorative and industrial installation scenarios)

Drive Types: Phillips, Slotted, Square, Hex socket. Slotted and flat heads are the most popular for craft and leather decoration, while hex and square drives are preferred for industrial equipment fastening with higher torque requirements.