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The Würth #8 x 3" flat head assembly screw is built for cabinet and casework joints where extra length is the deciding factor. A Type 17 Auger point, coarse thread, and #2 square drive combine in a 3-inch screw that reaches through stacked panels, thick face frames, and built-up cabinet components without losing grip or clean seating.
Most cabinet assembly screws top out at 2 or 2-1/2 inches, which covers standard panel-to-panel joinery just fine. The 3-inch version is for situations where that length falls short: attaching face frames to deep cabinet boxes, fastening through doubled-up substrate, securing nailers and reinforcement blocking inside a cabinet carcass, or connecting adjacent installed cabinets stile-to-stile through 1-1/2 inches of combined hardwood. The extra thread engagement at full depth is what keeps the joint tight when thicker material is in play. Pail packaging is convenient for movement around the shop or to the job site.
The screw is hardened steel with a zinc finish, suited to dry interior woodworking environments. The flat head carries nibs on its underside that cut into the wood surface as the screw seats, creating a clean countersink without a separate boring step. In hardwoods like maple or oak, the nibs help the head pull flush and stay seated under load. The Type 17 Auger point adds a fluted cutting edge at the tip that clears chips ahead of the thread, which reduces the torque needed to drive a 3-inch screw fully home and lowers the risk of splitting dense material near the end of the stroke.
Cabinet shops running production lines use this screw wherever thicker-than-standard stock appears in the build sequence. Installers pulling cabinets together on site reach for 3-inch screws when they need to connect finished cabinet runs through stiles or pull a face frame hard against a cabinet that has a thick back or a rear nailer. The 2000-piece pail suits shops that cycle through volume on custom runs and installers who want enough on the truck to finish a kitchen without restocking mid-job.
The 3-inch length is useful when fastening through doubled panels, thick face frames, or when pulling stacked cabinet components together. It gives more thread in the receiving material than shorter lengths can, which matters when the combined stock thickness exceeds what a 2-inch screw can reach.
In most wood substrates, yes. The nibs under the flat head mill a shallow countersink as the screw seats. In very hard or dense hardwoods, pre-drilling a shallow countersink can produce a cleaner result, but many shops run these without that step.
A #2 square drive bit. The square recess is designed to hold the screw on a correctly sized bit for one-handed placement when a true-to-size bit is used.
The 3-inch length and flat head profile work well for joining cabinet runs stile-to-stile on site. A washer can be added between the head and the stile face if you want to distribute the clamping load across the hardwood surface.
This screw carries a zinc finish rated for interior woodworking. It is not intended for outdoor or moisture-exposed applications.
When the job calls for deeper thread engagement than a standard cabinet screw delivers, this 3-inch Würth flat head assembly screw has the length, point geometry, and drive to get there cleanly and stay tight.
Sold In: 2000 Each
Quantity | Unit Price | Catalog | ||||
|---|---|---|---|---|---|---|
Sold in: 1 Each |  WW90210 Mfr# 0614176153961 1 | #2 x 1" Square Drive Insert Bit, 2 Piece Bit | ||||
Sold in: 1 Each |  WW90220 Mfr# 0614176139961 1 | #2 x 2" Square Drive Insert Bit, 2 Piece Bit | ||||
Sold in: 1 Each |  WW90230 Mfr# 0614176140961 1 | #2 x 3" Square Drive Insert Bit, 2 Piece Bit | ||||
Sold in: 1 Each |  WW90240 Mfr# 0614176142961 1 | #2 x 4" Square Drive Insert Bit, 2 Piece Bit | ||||
Sold in: 1 Each |  WW90260 Mfr# 0614176143961 1 | #2 x 6" Square Drive Insert Bit, 2 Piece Bit |