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    Screws
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    Item # WW39020 • Mfr # 3670000408961 1000

    Würth #8 x 1-1/4" Flat Head Assembly Screw Combo Drive - Sharp Point Coarse Thread Lubricated, 3670000408961 1000 - 1000/Box

    Description

    Wurth Flat Head Assembly Screw For Woodwork

    Wurth flat head assembly screw describes a case hardened #8 x 1-1/4 inch screw designed for assembly work, so installers get a fastener built to handle typical cabinet and woodworking connections. The screw uses a flat head, which sits flush in countersunk holes, keeping hinge plates, brackets, or hardware tight against the material. The coarse thread is specified in the description, so it bites aggressively into wood-based substrates, helping pull joints together during assembly. The point is described as sharp, so the screw starts quickly into material and drives with less wandering. The screw is lubricated, as stated, which reduces driving friction and supports smoother insertion under a drill or driver. The product is identified as an assembly screw in the description, indicating its role where repeatable, consistent fastening is needed in production or onsite work.

    Key Assembly Screw Details That Support Work

    • The case hardened description indicates the screw shank and threads are hardened, which supports resistance to typical driving torque in cabinet and woodworking assembly.
    • The flat head design allows the screw to seat flush in countersunk holes, which helps hardware, plates, or joints sit tight against the panel surface.
    • The screw is specified as lubricated, which lowers friction during driving and can help fasteners seat fully with smoother driver engagement.
    • The coarse thread noted in the description gives more aggressive bite in wood-based materials, helping draw parts together quickly in assembly.
    • The sharp point description means the screw starts into material readily, supporting faster driving without extensive pre-starting of holes.

    Installation And Drive Details For This Screw

    The web description specifies that the screw uses #2 Square Drive bits to insert, giving a positive bit engagement that supports firm driving in assembly situations. It also states that #2 Phillips Drive bits can be used for after market adjustment, so existing installations can be snugged or reset with a commonly carried bit. Length information notes that 3/4 inch and 1 inch screws in this product line are fully threaded, while other sizes are threaded two-thirds from the bottom, which clarifies how thread coverage changes by length. This #8 x 1-1/4 inch screw follows that pattern, so the upper shank section above the lower two-thirds remains unthreaded, which can help pull pieces tightly together when driving through one component into another.

    Using This Wurth Assembly Screw In Projects

    Where This Coarse Thread Screw Fits Best

    The category is listed as Fasteners and Screws, and the web description calls this an assembly screw, positioning it for cabinet and woodworking assembly tasks where repeatable fastening is needed. The sharp point and coarse thread combination supports use in wood-based materials where quick starting and strong holding are valuable, such as joining panels or fastening hardware plates. The flat head layout means it works where countersunk holes are prepared, allowing the head to sink and clamp hardware or joint faces evenly. Because the screw is case hardened, as described, it suits applications that involve powered driving with consistent torque, typical of production shops or serious installation work.

    Why Drive, Thread, And Lubrication Details Matter

    The specified combo of #2 Square Drive for primary insertion and optional #2 Phillips Drive for after market adjustment gives flexibility on site, since installers can use square bits for original construction and rely on Phillips bits for follow-up service. The mention that only 3/4 inch and 1 inch sizes are fully threaded, while longer sizes are threaded two-thirds from the bottom, explains that this 1-1/4 inch screw has a partially unthreaded upper shank, which helps pull the top piece tight to the substrate while the threads grip below. Lubrication described in the product details reduces driving resistance, which is helpful when setting many screws during cabinet or fixture assembly. The case hardened description means the screw is prepared for these repetitive driving loads, supporting consistent performance during runs of similar joints.

    Common Questions About This Wurth Assembly Screw

    What size and type is this Wurth assembly screw?

    This product is listed as a Wurth #8 x 1-1/4 inch flat head assembly screw, so it fits applications calling for that specific diameter and length.

    How are the threads arranged on the 1-1/4 inch length?

    The description states that lengths other than 3/4 inch and 1 inch are threaded two-thirds from the bottom, so the 1-1/4 inch screw has a partially unthreaded upper shank.

    What drive style does this assembly screw use?

    The web description states it uses #2 Square Drive bits for insertion, providing positive engagement for powered or manual driving.

    Can a Phillips bit be used with this screw?

    The description notes that #2 Phillips Drive bits can be used for after market adjustment, which helps when servicing or tightening existing installations.

    Why is this screw described as case hardened?

    The product description lists the screw as case hardened, which prepares it for the typical torque and driving demands in assembly and installation work.

    How does the lubricated finish affect driving?

    The screw is described as lubricated, which reduces friction during driving and supports smoother seating into wood-based materials.

    Selecting This Screw For Assembly Tasks

    This Wurth #8 x 1-1/4 inch flat head assembly screw combines a case hardened body, lubricated coarse threads, and a sharp point to support efficient fastening in wood-based assemblies. The specified drive system uses #2 Square Drive bits for primary installation and allows #2 Phillips Drive bits for after market adjustment, so one screw type serves both initial build and later service work. When a project calls for this thread pattern, drive style, and length, choosing this screw matches the listed characteristics to the assembly requirements.

    Catalog
    P-10
    Gauge
    8
    Length
    1-1/4 in
    Thread
    Coarse thread
    With Nibs
    Yes
    Point Type
    Sharp
    Head Type
    Flat head
    Drive Size
    #2
    Drive Type
    Combo
    Product Type
    Assembly Screw
    Number of pieces
    1000
    Supplier Pack Size
    4000
    Sold In
    1000
    Catalog
    P-10
    Gauge
    8
    Length
    1-1/4 in
    Thread
    Coarse thread
    With Nibs
    Yes
    Point Type
    Sharp
    Head Type
    Flat head
    Drive Size
    #2
    Drive Type
    Combo
    Product Type
    Assembly Screw
    Number of pieces
    1000
    Supplier Pack Size
    4000
    Sold In
    1000
    3/4 in1 in1-1/8 in1-1/4 in1-3/8 in1-1/2 in1-3/4 in2 in2-1/2 in2-3/4 in3 in
    Coarse threadTurbo thread
    YesNo
    2505001000150020002500350040005000750080001000015000
    Würth
    $70.00/1000 Each
    $0.07 /Each
    Würth #8 x 1-1/4" Flat Head Assembly Screw Combo Drive - Sharp Point Coarse Thread Lubricated, 3670000408961 1000 - 1000/Box
    Item# WW39020 / MFR Part # 3670000408961 1000
    Each
    Each
    In Stock

    Sold In: 1000 Each

    Each

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