Würth #8 x 3" Flat Head Assembly Screw Phillips Drive - Sharp Point Coarse Thread Black, 3670000150961 1000 - 1000/Box

#8 Flat Head Assembly Screw For Secure Fastening

#8 x 3 inch flat head assembly screw gives installers a Phillips drive, sharp point coarse thread fastener in black that pulls parts together for assembly work where a flush head is needed against the material surface. The flat head profile lets the screw sit down into countersunk holes so faces stay smooth when you are assembling components that need a clean, unobtrusive look. The black finish provides a dark appearance that helps this screw visually recede on darker materials or hardware, which is useful when exposed fasteners would otherwise stand out. Case hardened construction means the screw body is hardened for strength, helping it stand up to driving torque during assembly without deforming under normal driving loads. Using a standard #2 Phillips drive bit matches a common bit size on site and in the shop, supporting quick driving with typical drills or drivers.

Assembly Screw Details That Support Daily Work

• The flat head design creates a flush seating surface in countersunk holes, which matters when assembling parts that must stack, close, or align tightly without a raised fastener head catching adjacent components.
• The #8 diameter paired with the 3 inch length gives a long reach for assembly joints, allowing the screw to pull thicker parts together where additional penetration depth through the material is required.
• The Phillips drive configuration uses #2 Phillips drive bits, so drivers and bits already used for many other screws can also turn this fastener without changing setups between different head styles.
• The sharp point coarse thread geometry is suited to biting quickly into material as the screw is driven, which helps the screw start and advance while maintaining grip over most of its working length.
• The case hardened specification describes a hardened outer surface on the screw, which supports resistance to head cam-out and shank damage when the screw is driven firmly during assembly work.
• The black finish on the screw provides a dark appearance on the head, which is important when fastener visibility should be minimized against dark components in finished assemblies.

Fastener Driving And Bit Selection For Installation

This Wurth flat head assembly screw uses a Phillips drive so it is driven with compatible Phillips drive tools during installation in assembly operations. The specified #2 Phillips drive bits match the screw head geometry, allowing the bit to seat into the cross recess so torque is transferred effectively as the screw is driven. That drive match helps reduce slipping in the recess when consistent pressure is applied while installing multiple screws in a run. The sharp point and coarse thread engage material as soon as the tip contacts the work, so the screw can start feeding into the substrate without pre-forming a mating thread. With a 3 inch overall length, the screw can be driven to span thicker assembly sections or layered parts, and the flat head brings the driving force down to clamp those components together at the countersunk seat.

Using This Wurth Screw In Assembly Projects

Where This #8 Assembly Screw Is Applied

As a Wurth #8 x 3 inch flat head assembly screw, this fastener is intended for assembly situations that call for a countersunk, flush head and a longer reach through joined parts. The flat head shape lets the screw sit into a countersink, so once fully driven the head rests level with or below the surrounding surface where a smooth face is required. The sharp point and coarse thread work together to engage material from the tip upward, helping the screw bite and advance through the joint as torque is applied. Since the screw is case hardened, it is structured to handle the driving forces typical of assembly operations, which matters when multiple screws are driven in sequence with powered drivers. The black finish supports use where a dark, subdued fastener appearance is preferred on workpieces or hardware elements.

Why The Verified Details Matter For Consistent Results

The note that 3/4 inch and 1 inch lengths are threaded fully while all other sizes are threaded two-thirds from the bottom means that this 3 inch screw is threaded along approximately the lower two-thirds of its length, leaving an upper unthreaded shank portion. That partial threading helps the lower threads grip the base material while the upper shank can slide through a clearance hole in the top piece, allowing the screw to draw the two parts tightly together during assembly. The use of #2 Phillips drive bits gives installers a widely used bit standard, so bit selection stays straightforward and driving remains consistent across many fasteners of this type. Case hardened construction supports the integrity of the head and shank as torque is transmitted, which is important when working with assembly jigs or repeated fastening cycles. The black finish, combined with the flat head profile, allows the screw to sit flush and visually recess, supporting a more uniform appearance on dark assemblies where exposed bright fasteners would be more noticeable.

Common Questions About This Wurth Assembly Screw

Select This Screw For Countersunk Assembly Joints

This Wurth #8 x 3 inch flat head assembly screw with sharp point coarse thread, case hardened construction, and black finish is suited to assembly tasks needing a flush, countersunk head. The #2 Phillips drive uses a familiar bit, simplifying driving across repeated fastenings with the same screw type. This fastener is sold in standard boxes of 1,000 and in bulk packs as specified, so projects that rely on this exact geometry can draw from consistent quantities. Selecting this screw aligns the head style, drive type, threading pattern, and finish into one fastener choice for assembly work where these verified details are required.