Page 4 of Protex Fasteners Catalogue by Protex Fasteners Limited

l RIGID CLAW FASTENERS Rigid claw fasteners are manufactured from rigid steel strip or rigid wire forms. Where rigid claw fasteners are fitted we suggest that a rubber type seal is used within the application to provide some resilience between the fastener and catch plate. If this is not possible we suggest that a spring claw fastener should be used. l ULTIMATE TENSILE STRENGTH The ultimate tensile strength (UTS) for our items is shown in the relevant product tables throughout the catalogue. The figures for the UTS have been determined by tensile tests in a normal working load direction on standard products and do not include any safety factors. A maximum load rate of 30mm per minute was applied throughout the tests. The UTS figures are shown in kilograms and for a Safe Working Load we suggest that approximately half of the ultimate strength figure is used. l SPRING CLAW FASTENERS Spring claw fasteners are manufactured using spring steel curved wire or coil springs and can be used to provide resilience. The degree of spring deflection up to a maximum working load varies between different fasteners and is shown in the relevant product tables within the catalogue. Extension spring claws pulled beyond their maximum working load will take a permanent set. Compression spring claws pulled beyond their maximum working load will become coil bound (i.e. rigid) and will no longer act as a spring. l CATCH PLATES The alternative catch plates which are recommended for each fastener are shown in the relevant product tables throughout the catalogue. These may included flat, wide, narrow, 90 crank, reverse crank, joggled and no holes self finish suitable for welding. l ADJUSTABLE FASTENERS Adjustable fasteners incorporate either a screwed spindle or threaded eyebolt and trunnion which produce a minimum 10mm of adjustment. This gives the strength advantages of a rigid fastener while allowing the required tension to be set after fitting. GENERAL FASTENER GUIDE 2 4 4 View download @ 3D models and CAD files www.protex.com Flat 90 Crank Reverse Crank Joggled No Holes self finish

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