Machine Screws & Bolts, Countersunk Screw | RS
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    Machine Screws

    A machine screw is a blunt-ended screw that is used to fasten metal parts together. They can be coarse-threaded or fine-threaded and come in a wide range of head types. Most machine screws are fully threaded, which means the thread runs the full length of the fastener, from just under the head to the very end. You can learn more in our complete guide to machine screws.

    RS offer an extensive range of high-quality metric and imperial fixings for all your metalworking and panel building needs.

    What are machine screws made of?

    The fasteners are manufactured from a range of materials to suit various applications and environments. Materials include:

    • Brass
    • Steel
    • Stainless steel- A4 (316) and A2 (304) grades
    • Nylon

    Some come with coatings such as nickel-plated zinc-plated, galvanized, or passivated which helps to deter rust.

    Head and drive types

    Machine screws are available in a wide choice of driver and head types. Choosing the right fastener must be carefully considered.

    Head shapes

    The most popular head types are countersunk or Cheesehead although there are other types around including Truss, Pan, Hex, and round.

    Drive types

    A machine screw drive type refers to the type of tool you will use to install or remove the screw. There is a vast array of drive types, the most common being slotted, Phillips, Hex, and Pozi.

    Where would I use a machine screw?

    The screws are typically used to securely fasten metal parts together in machinery, tools, and panels. They can also be used in:

    • Appliances
    • Electronic devices
    • Vehicles

    1652 Products showing for Machine Screws

    RS PRO
    Countersunk
    Slot
    -
    30mm
    M8
    -
    Steel
    DIN 963
    -
    Bright Zinc Plated
    1.25mm
    -
    -
    -
    RS PRO
    Cheese
    Slot
    -
    16mm
    M2.5
    -
    Nylon
    DIN 84
    -
    Plain
    0.45mm
    -
    -
    -
    RS PRO
    Pan
    Slot
    -
    50mm
    M6
    -
    Steel
    DIN 85
    -
    Clear Passivated Zinc Plated
    1mm
    -
    -
    -
    RS PRO
    Countersunk
    Slot
    -
    35mm
    M8
    -
    Stainless Steel
    DIN 963
    A2 304
    -
    1.25mm
    -
    -
    -
    $0.859
    Each (In a Pack of 100)
    RS PRO
    Truss
    Phillips
    1/2in
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    RS PRO
    Countersunk
    Slot
    -
    12mm
    M3.5
    -
    Steel
    DIN 963
    -
    Clear Passivated Zinc Plated
    0.6mm
    -
    -
    -
    RS PRO
    Countersunk
    Hex Socket
    2in
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    RS PRO
    Countersunk
    Hex Socket
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    RS PRO
    Pan
    Pozidriv
    -
    20mm
    M3.5
    -
    Steel
    DIN 7985Z
    -
    Bright Zinc Plated
    0.6mm
    -
    -
    -
    $0.265
    Each (In a Pack of 100)
    RS PRO
    Oval
    Phillips
    3/8in
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    RS PRO
    Countersunk
    Phillips
    2in
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    RS PRO
    Cheese
    Slot
    -
    40mm
    M5
    -
    Steel
    DIN 84
    -
    Bright Zinc Plated
    0.8mm
    -
    -
    -
    RS PRO
    Countersunk
    Hex Socket
    1in
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    RS PRO
    Pan
    Pozi
    -
    6mm
    M4
    -
    Stainless Steel
    DIN 7985
    A4 316
    -
    0.7mm
    -
    -
    -
    RS PRO
    Pan
    Slot
    -
    10mm
    M3
    -
    Stainless Steel
    DIN 85
    A2 304
    -
    0.5mm
    -
    -
    -
    $0.41
    Each (In a Pack of 100)
    RS PRO
    Pan
    Phillips
    1/2in
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    RS PRO
    Countersunk
    Pozi
    -
    6mm
    M4
    -
    Stainless Steel
    DIN 965
    A2 304
    -
    0.7mm
    -
    -
    -
    $0.516
    Each (In a Pack of 100)
    RS PRO
    Pan
    Phillips
    2in
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    RS PRO
    Countersunk
    Phillips
    5/8in
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    RS PRO
    Round
    Phillips
    1 1/4in
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
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