Würth #8 x 1-3/8" Flat Head ASSY Screw RW Drive - Drill Point Fine Thread Zinc, 017810435 961 500 - 500/Box

1-3/8" Assembly Screw For Hardwood Cabinets and Tight Panel Joints

The Würth #8 x 1-3/8" ASSY Assembly Screw is a flat head, fine-thread screw built for cabinet construction and casework where material thickness is on the modest side and clean seating matters. The drill point, milling nibs, and RW20 drive work together to reduce splitting, pull the head flush, and maintain positive bit engagement through repeated production driving.

Key Features

• 1-3/8" length sized for single-panel fastening and cabinet assembly in standard 3/4" material with adequate thread penetration into the receiving piece.
• Fine thread provides tighter thread engagement in hardwood face frames, solid wood components, and denser cabinet substrates.
• Drill point starts the screw cleanly and removes chips at the tip to reduce splitting, particularly near edges and in denser wood species.
• Flat head with milling nibs cuts a clean countersink as the screw seats, helping the head land flush in hardwoods, laminates, and finished panels.
• RW20 drive delivers deep bit contact and a broad engagement surface to reduce cam-out and extend bit life during high-repetition fastening.
• Zinc finish, 500 per box keeps this screw ready for production-volume cabinet and casework assembly in interior applications.

Where the 1-3/8" Length Fits the Job

At 1-3/8", this screw lands in a practical range for cabinet assembly where panels and components are standard 3/4" thickness. It drives through the near-side material and threads deeply enough into the receiving piece to hold the joint without over-penetrating thin backs, cabinet bottoms, or panel edges. It is a natural fit for attaching face frame components to cabinet boxes, joining interior cabinet panels, and fastening drawer box parts where a shorter screw would leave thread engagement short and a longer screw would push through.

The fine thread makes this screw the right choice when the receiving material is a hardwood like maple, oak, or cherry. Fine threads engage the dense grain with less radial pressure than a coarse thread would apply, reducing the risk of splitting in tight-grained hardwood and providing solid holding power once seated.

Drill Point, Nibs, and Zinc Finish

The drill point on this screw features sharp cutting edges with chip-clearing geometry that allows the tip to start and advance without the aggressive wedging action that splits material near edges. A centerpoint keeps the screw positioned accurately at startup, which matters when driving close to a panel edge or into a pre-marked layout point. The milling nibs under the flat head do the work of a countersink bit as the screw seats, producing a clean, flush head recess in hardwoods, softwoods, and laminates without a separate countersinking step. The zinc finish is suited to the dry indoor environments where cabinet assembly screws are used. Each box contains 500 screws.

Production Cabinet Shops and Finish Carpenters

This screw is a practical choice for cabinet shops running hardwood face frames, solid wood casework, or finished interior panels where a flush, clean result at every fastening point is part of the quality standard. The RW20 drive keeps bit engagement consistent across a long production run, which reduces driver resets and bit swaps. Finish carpenters installing hardwood face frames or fitting solid wood cabinet components on site will find the fine thread and nibs pull cleanly into dense material without the prep work a standard flat head would require. The 500-piece box supports steady production use without frequent reordering.

Common Questions

Flush, Consistent Results Across Every Joint

When the job calls for clean, flush fastening in hardwood cabinets and finished interior panels, the Würth #8 x 1-3/8" ASSY Assembly Screw delivers the thread, point, and head geometry to get there without extra prep steps or bit changes slowing the work down.