Fixing method

Information  (Screw Thread Terminology) 

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a simple locking device coiled or formed from wire or pressed from strip.


It is often a simple ring used to compensate for axial play. Sometimes identified in their radial applications as internal (for bores) or external (for shafts) but more often than not they spring into a groove to lock another component in place or they take up any axial play that is likely due to tolerancing.






How to measure a standard circlip: At the widest point measure from the outside of one edge to the inside of the opposite edge. For internal circlips we require the bore housing. For external circlips we require the shaft diameter.


Starlock push on fasteners

External fixing washers for use not only on precision-machined shafts but also on tubes, cast parts, plastic shafts and studs.

The washers are pushed on to the shaft causing the prongs to grip the shaft tightly, locking the washers in place with initial tension. )

 Carbon spring steel and stainless steel (certain sizes only)

Surface Finish:
Uncapped fasteners can be supplied in bronze and varnish or in mechanical zinc plated finishes and certain sizes are available in stainless steel. Caps are supplied in stainless steel.

Available for shaft sizes 1.5mm to 25mm.

Hose Clamps

The rolled edges of the band allow for smooth clamping of the hose upon tightening or when clamped. Hose Clamps are available in different diameter ranges to match various pipe and hose joint connections.



Push on Fasteners

Push-in Fasteners provide an inexpensive, fast, convenient method to join plastic, light sheet metal, insulating materials, circuit boards, or any other thin, lightweight material. They can also be used as push-in glides or as bumpers. Special designed legs provide compresion and expansion to lock fastener into pre-punched holes. These fasteners are vibration, abrasion, and corrosion resistant, and feature large heads for easier assembly, and can be used over and over. (


Cotter Pins

Cotter pins come in many shapes and sizes and materials. They are basically a pin that can be spread after insertion into a hole.



Holes must first be drilled in the rods or wood. Clip the pin onto the wire, put the 2 legs of the pin through the hole and bend the ends back to the fence wire.


Pre drilled assembly into which the cotter pin is pushed in and legs bent backwards


a clevis pin into which the cotter pins is pushed through and spread causing it to lock .

Nuts bolts screws and washers

Hex bolts, also known as hex cap screws or machine bolts.

A carriage bolt mostly used in wood with a domed top and a square under the head. This pulls into the wood as the nut is tightened.

Socket screws, also known as Allen head are fastened with a hex Allen wrench. Available in several head styles and materials.

Washers provide a greater bearing surface under the fastener. This helps prevent a nut, bolt or screw from pulling through the material.

 The washer acts as a means of distributing the stress applied to components that are bolted together. The washer also cuts down on friction as the bolt is being turned. As a general rule of thumb, it's best to place a washer between two fasteners where the actual turning action is taking place when tightening. This allows a washer to do its

A wood screw for use exclusively in wood. Available in a variety of head styles and materials.

Sheet metal screw. Highly versatile, used in wood, fiberglass and metal, also called self-tapping screws. Available in steel and stainless steel.





Often called a lag screw. Hex lag bolts are for fastening in wood. Available in a variety of materials.

Hex lock nuts The bolt threads into the nylon material located at the top of the nut. This helps prevent loosening from vibration.

A hex nut is basically a six sided nut that comes in a variety of sizes and materials. It is locked onto a bolt. Used to attach machine thread fasteners.



Screw measurements

There are many systems for specifying the dimensions of screws, but in much of the world the ISO preferred series metric has displaced the many older systems.


Metric screws

The diameter of a ISO preferred series screw is specified in millimetres (mm) prefixed by the capital letter M, as in "M6" for a 6 mm diameter screw.

The pitch of metric threads varies according to the diameter, but not absolutely regularly. Some examples: a M3 thread has a 0.5 mm pitch, M4: 0.7 mm, M6: 1 mm, M10-12: 1.5 mm, M14-16: 2 mm, M18-22: 2.5 mm.

The diameter of a metric screw is the outer diameter of the thread. The tapped hole (or nut) into which the screw fits, has an internal diameter which is the size of the screw minus the pitch of the thread. Thus, an M6 screw, which has a pitch of 1 mm, is made by threading a 6 mm shaft, and the nut or threaded hole is made by tapping threads in a 5 mm hole.

Metric screw threads are also available in "fine pitch" versions, sometimes several pitches for one diameter (example: M18/fine in 1, 1.5 and 2 mm pitches). The fine thread series is deprecated and not recommended for use in new designs. The fine metric threads were once found in equipment made in the Far East, but that has changed with the standardisation of the ISO preferred thread series.