https://www.findtheneedle.co.uk/companies/caleb-components-ltd/products/1-5x8mm-st-stl-heavy-duty-coiled-spring-pins-iso-8748
1.5X8mm ST/STL Heavy Duty Coiled Spring Pins - ISO 8748 UK Supplier
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https://driv-lok.com/products/pin-fasteners/roll-pins/slotted-coiled-spring-roll-pins/
Slotted and Coiled Spring Pins - DRIV-LOK
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