More Handles stocks a huge range of screws to suit all applications.  Supplying the industry leading TIMco Brand of screws we are confident that we have the best screw for whatever your project.

Below we set out some useful infomation on how to identify and understand some of the common industry jargon when it comes to screws, and to help you know what kind of screw you should specify for which job. 

 

Screw Types and Information

The information below details the different kind of recess and head types that are available from the TIMco range of screws, fixings and fasteners.

 

Screw Recess Types


  • torx recess

    TIM DRIVE RECESS / TORX DRIVE
    High performance recess on TIMco Multi-Fix and Velocity Screws.

  • cross recess

    CROSS-RECESS / POZI RECESS
    Standard recess for woodscrews, chipboard screws etc.

  • torx recess

    PHILLIPS RECESS
    Standard recess for self-drilling and drywall screws.

  • torx recess

    SLOTTED RECESS
    Traditional recess for certain woodscrews.

  • torx recess

    SQUARE RECESS / ROBERTSON DRIVE
    Recess on square drive pan self-drilling screws.

 

 

Screw Head Types


  • torx recess

    COUNTERSUNK HEAD
    Designed for countersinking into timber for a flush or recessed finish.

  • torx recess

    DOUBLE COUNTERSUNK HEAD
    Improved design on the countersunk head to give additional head strength and assist countersinking.

  • torx recess

    COUNTERSUNK RIBBED HEAD
    Small ribs on the countersink to assist completion of countersinking.

  • torx recess

    BUGLE HEAD
    A curved surface under the head to prevent damage or tearing to the plasterboard paper.

  • torx recess

    RAISED HEAD COUNTERSUNK
    A countersunk head with a slight raised dome for an attractive finish. Ideal for use in hinges.

  • torx recess

    PAN / ROUND HEAD
    Head with a flat underside. Designed for application fixing against metal surfaces.

  • torx recess

    WAFER HEAD OR FLANGE HEAD
    Low profile head with a flat underside for applications where a large clamping area and an unobtrusive head is required.

  • torx recess

    HEXAGON HEAD WASHER FACE
    Positive drive Hex Head with an integral washer to increase clamping effectiveness.

  • torx recess

    HEXAGON HEAD WITH WASHER
    As above with EPDM washer to prevent water ingress.

 

 

Screw Thread Types


  • torx recess

    COARSE THREAD (up to 16 TPI)
    Also know as spaced threads, they are normally used for all timber applications and for steel with lesser thickness (1-2.4mm normally).

  • torx recess

    FINE THREAD (over 16 TPI)
    Also known as metric threads, they are only used in steel applications. Fine threads are for use with thicker steels (2.4 - 12mm thickness).

  • torx recess

    TWIN THREAD
    Also known as twin lead threads, they are designed to give a fast insertion time in soft material.

  • torx recess

    HI-LO THREAD
    Is used in soft timbers, plastics and into thin sheet sections. Hi-Lo threads have superior holding power compared to a low TPI coarse thread in these types of material.

 

 

Screw Point Styles


  • torx recess

    NEEDLE / GIMLET AND SUPER SHARP POINT (SS)
    Designed for piercing timber, mdf, plastic and light gauge metal up to 0.6mm without pre-drilling.

  • torx recess

    AB POINT
    For use in heavy sheet material applications.

  • torx recess

    B POINT
    For use in shallow holes.

  • torx recess

    SELF DRILL POINT
    For drilling into metals without the need for pre-drilling.

  • torx recess

    TYPE 17 POINT
    Also known as slash point, they are used for fixing timber without the need to pre-drill. The slot at the end forms a cutting edge which reduces splitting of timber. It also penetrates thin sheet metal if required.

  • torx recess

    DOUBLE SLASH POINT
    Designed to assist precisely when used in hard material such as plastic and thin sheet metal.

 

 

Screw Measuring Information

The measuring guides below explain how to measure a screw gauge, thread, threads per inch and how to measure the overall length of a screw.

 

Screw Gauge


The gauge of the screw is determined by the thread diameter.

Screw Gauge Pic

Screw Gauge Conversion Table

 

 

Screw Thread Length


Below shows how to work out the thread length.

Screw Thread Length

 

 

Screw Measuring Lengths


Fasteners with the following Head Types are measured from the underside of the head to the point of the screw:

Screw Measuring Lengths pic1

Measurement to the point of the screw

Fasteners with the following head types are measured from the top of the head to the point of the screw:

Screw Measuring pic2

Measurement to the point of the screw

 

 

Size Conversion Table


 The table shows the closest conversion value from imperial to metric.

Size Conversion Chart

 

 

Screw Threads Per Inch (TPI)


 The TPI is the number of thread crests that can be counted within 1” (25.4mm).

Screw Teeth Per Inch (TPI)

 

 

Please contact one of our Hardware Team at More Handles who are specialists in TIMco Screws and will be happy to advise and answer any  questiosn you may have.

www.morehandles.co.uk

sales@morehandles.co.uk

01228 516516



 

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