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    Screws
    1. Home
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    Item # WW31800 • Mfr # 3670000099961 1000

    Würth #8 x 1-1/4" Flat Head Assembly Screw Square Drive - Type 17 Auger Point Coarse Thread Zinc, 3670000099961 1000 - 1000/Box

    Description

    Wurth #8 x 1-1/4 Inch Screw For Assembly

    Wurth #8 x 1-1/4 inch screw is a flat head assembly screw with a square drive, so it seats flush in countersunk holes while giving positive bit engagement during driving. The screw uses a Type 17 auger point, which starts cleanly into wood and speeds driving into typical assembly materials. Its coarse thread is designed to bite quickly and pull parts together firmly over the threaded length. The screw uses #2 square drive bits, so installers can match it with common square-drive tools already used in many shops. The screw is case hardened, which supports a tough outer surface for driving. The zinc finish provides a coated surface that separates the steel from surrounding materials during normal indoor use.

    Key Assembly Screw Details For Daily Work

    • The flat head design seats into countersunk holes so assembled parts sit flush, which helps face frames, stretchers, or similar parts pull tight without proud fasteners.
    • The #8 x 1-1/4 inch size gives a defined shank and length, which supports repeatable penetration into mating parts when laying out standard construction patterns.
    • The coarse thread runs along the shank to grab wood fibers aggressively, helping parts draw together without relying on excessive driving torque.
    • The Type 17 auger point cuts its own entry path, which reduces wandering at the start of the drive and supports more accurate placement along layout lines.
    • The #2 square drive interface locks into the driver bit, which helps reduce cam-out under load and lets the installer maintain controlled driving pressure.
    • The case hardened screw body combines a hardened exterior with a supportive core, which keeps the head and threads firm during normal assembly driving.
    • The zinc finish provides a uniform plated surface on the screw, which supports a consistent appearance across visible fastener locations on a project.

    Assembly Screw Details That Affect Installation

    The flat head on this screw is shaped to sit down into countersunk holes, so parts like cabinet components can close up without the fastener head interfering. The #8 diameter defines the pilot and clearance drill strategy around this screw, supporting predictable grip in typical woodworking assembly. At 1-1/4 inch long, the screw length supports standard overlap between parts where a mid-length fastener is preferred. The coarse thread form engages wood with fewer turns, which speeds driving and provides pull in softer substrates. The Type 17 auger point cuts as it advances, reducing wandering as the screw bites into the workpiece. The #2 square drive interface maintains bit engagement under torque, supporting steady power-tool use in repetitive assembly runs.

    How This Wurth Screw Fits Shop Assembly

    Using The Wurth Flat Head Assembly Screw

    This Wurth flat head assembly screw is designed with a countersinking head, so it fits into tapered holes where a flush or near-flush finish is required. The #8 size gives a consistent shank diameter that pairs with typical cabinet and woodworking stock thicknesses. At 1-1/4 inch long, the screw can bridge two parts while leaving adequate bite in the base material. The coarse thread form allows the screw to advance quickly through the joint, which is useful when driving multiple fasteners in production sequences. The Type 17 auger point starts directly into wood, so it penetrates material while helping to control wandering at the entry point. The #2 square drive works with standard square drive bits, supporting repeated installations with power drivers. The zinc finish covers the case hardened steel, so the surface presents a uniform metallic appearance wherever the head remains visible after assembly.

    Why These Screw Details Support Consistent Results

    The flat head shape controls how force is transferred around the countersunk pocket, which helps the screw clamp parts together evenly as it seats. The #8 diameter establishes a repeatable holding profile in typical woodworking materials, giving predictable grip from job to job. With a 1-1/4 inch length, penetration depth remains consistent in repeated layouts, which simplifies setting fastener locations across a run of components. The coarse thread profile reduces the number of rotations required to tighten the joint, which can shorten cycle time when many screws are driven. The Type 17 auger point removes material as it cuts its path, which supports cleaner starts in wood. The #2 square drive geometry resists cam-out when torque loads rise, so fastener heads stay intact through normal driving. The case hardened construction supports the screw during installation, while the zinc finish contributes a consistent look across all visible screw heads on completed assemblies.

    Common Questions About This Wurth Assembly Screw

    What is the size and head style of this screw?

    This Wurth #8 x 1-1/4 inch screw uses a flat head, so it fits into countersunk holes and helps assembled parts sit flush at the joint line.

    What drive type does this Wurth assembly screw use?

    This assembly screw uses #2 square drive bits, which allows solid bit engagement and helps reduce cam-out when driving with power tools.

    How does the Type 17 auger point help in use?

    The Type 17 auger point cuts into the wood as it enters, which supports cleaner starts and helps the screw follow layout positions accurately.

    Why is a coarse thread useful on this screw?

    The coarse thread on this screw bites into wood with fewer turns, which helps pull parts together quickly and supports efficient assembly work.

    What does case hardened construction mean for this screw?

    The case hardened design provides a hardened outer surface on the screw, supporting the head and threads during normal driving in assembly tasks.

    What is the finish on this Wurth assembly screw?

    This Wurth assembly screw has a zinc finish, giving it a consistent plated appearance wherever the head remains visible after installation.

    Selecting This Screw For Assembly Tasks

    This Wurth flat head assembly screw combines a #8 diameter, 1-1/4 inch length, and coarse thread with a Type 17 auger point and #2 square drive. These details work together to support controlled, repeatable assembly in wood applications where a zinc finished screw is appropriate.

    Catalog
    P-9
    Color/Finish
    Zinc
    Gauge
    8
    Length
    1-1/4 in
    Thread
    Coarse thread
    With Nibs
    Yes
    Point Type
    Type 17 Auger
    Head Type
    Flat head
    Drive Size
    #2
    Drive Type
    Square
    Product Type
    Assembly Screw
    Number of pieces
    1000
    Supplier Pack Size
    4000
    Sold In
    1000
    Catalog
    P-9
    Color/Finish
    Zinc
    Gauge
    8
    Length
    1-1/4 in
    Thread
    Coarse thread
    With Nibs
    Yes
    Point Type
    Type 17 Auger
    Head Type
    Flat head
    Drive Size
    #2
    Drive Type
    Square
    Product Type
    Assembly Screw
    Number of pieces
    1000
    Supplier Pack Size
    4000
    Sold In
    1000
    1 in1-1/4 in1-1/2 in1-5/8 in1-3/4 in2 in2-1/4 in2-1/2 in3 in
    1000200025003000350040004800500055007000900011000
    Würth
    $90.00/1000 Each
    $0.09 /Each
    Würth #8 x 1-1/4" Flat Head Assembly Screw Square Drive - Type 17 Auger Point Coarse Thread Zinc, 3670000099961 1000 - 1000/Box
    Item# WW31800 / MFR Part # 3670000099961 1000
    Each
    Each
    In Stock

    Sold In: 1000 Each

    Each

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