All Screw Spikes come complete with a Double Spring Washer also commonly known as (Fe6 Double Helical), also available separately. 

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Standard sizes readily available.

All non-standard (custom) sizes require an additional lead-time of 5-6 weeks.

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ARSC Screw Spikes are manufactured in an ISO9001 accredited facility to the Australian Standard AS1085.18 & AS1085.7

*Spec sheets available on request*