Würth #8 x 1-9/16" Flat Head ASSY Screw RW Drive - Sharp Point Coarse Thread Zinc, 019014040 961 500 - 500/Box

RW Drive Assembly Screw For Cabinet Box and Carcass Work

The Würth #8 x 1-9/16 inch flat head ASSY screw is a purpose-built assembly fastener for cabinet box construction, carcass assembly, and interior woodworking joints. At 1-9/16 inches, this length seats fully through one panel and into the next without over-penetrating standard 3/4-inch sheet goods, making it a practical choice for box assembly where penetration depth matters.

Key Features

• 1-9/16 inch length sized to drive through a face panel and into a second member without blowing through the back of standard 3/4-inch sheet stock.
• RW20 drive provides a deep, wide-wing recess that improves bit contact and reduces cam-out during repetitive driving.
• Flat head with milling nibs seats flush in wood and panel materials by milling its own countersink as the screw is driven.
• Sharp point with coarse thread starts quickly in softwood, plywood, MDF, and melamine-faced particleboard without a pilot hole in most applications.
• Zinc finish for clean, corrosion-resistant performance in interior cabinetry and woodworking environments.
• 500 screws per box with a compatible RW20 bit included, ready for production use.

Where the 1-9/16 Inch Length Fits

Cabinet box assembly typically involves joining two panels of 3/4-inch sheet material, or driving through a thinner nailer or back panel into a thicker side. The 1-9/16 inch length threads fully into the second member while keeping enough shank engagement to hold the joint tight. It is well suited for attaching cabinet nailers, joining a back panel rabbet, connecting stretchers to cabinet sides, or fastening interior horizontal dividers where a shorter screw would under-engage and a longer one would risk exit on the far face. For shops building face-frame or frameless carcasses from plywood, melamine particleboard, or MDF, this length handles the most common box joinery scenarios without adjustment.

RW20 Drive and Flat Head With Nibs

The RW20 recess is a Würth-designed drive with wider wings and deeper engagement than standard star or square recesses. That geometry transfers more torque to the screw and reduces bit wear across a full production run. Pair the drive with an impact driver or a dedicated screwgun and the bit stays seated through repeated cycles. The flat head carries milling nibs on its underside that cut a clean countersink in wood and panel materials as the screw seats, so the head finishes flush without a separate countersink step. This is especially useful on cabinet interiors where a proud head interferes with drawer hardware or shelf pin placement.

A Production Screw for Interior Cabinet Shops

Cabinet shops building in volume need a box screw that starts consistently, drives without fuss, and seats flush in a range of panel materials. The sharp point enters softwood and engineered panels quickly, and the coarse thread grips the fiber matrix of plywood, MDF, and particleboard where fine threads would under-hold. The zinc finish keeps the screw clean and rust-free in a shop environment. The 500-count box with an included bit means the first screw drives as soon as the box opens, with no separate bit sourcing required. Frameless carcass builders, face-frame shops, and custom cabinet installers working in painted or melamine interiors will find this length covers the majority of their box assembly fastening without switching screws mid-job.

Questions About This Screw

Box Assembly Done Right

When the joint is 3/4-inch panel meeting 3/4-inch panel and the finish has to be flush, the Würth 1-9/16 inch ASSY screw with RW20 drive delivers the penetration depth, head seating, and drive engagement that cabinet box work demands, 500 screws at a time.