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1/4-20 x 1-1/2" Socket Head Cap Screws, Allen Socket Drive, Stainless Steel 18-8 (304), Full Thread, Bright Finish, Machine Thread, 25 PCS : Amazon.co.uk: DIY & Tools
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BSW Whitworth 1/2" Socket Cap Screw High Tensile 12.9 DIN 912 – Fixaball Ltd. Fixings and Fasteners UK
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