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CL 01 4 50 50 20 10 1 Re v 0 2 89 Stat e 08 0 2 20 24 Würth Ireland Ltd For secondary attachments in cavity walls hollow ceilings and all types of panel material • The spring toggle expands automatically in any position • The design of a spring toggle means it does not need to be inserted as deeply in a cavity as a toggle anchor • With large and variable useful length • Fully preassembled • Antirotation lock claws prevents movement during installation • Load distributed over large surface area to ensure good holding power Performance data Anchor diameter [mm] M3 M4 “break values” of anchor The loadbearing behaviour of the surface is not taken into account Fbreak [kN] 1 0 1 2 0 1 Type W-FKH 0 1 hook bends up Type W-FKH 0 3 hook bends up 1 Threaded rod breakage or failure of the tilting element Spring toggle type W-FK with washer and brass knurled nut zincplated steel Type description W-FK Material Steel Surface Zinc plated Design With washer and MS knurled nut Thread type Metric thread Art no 0904 731 0904 741 P Qty 25 25 Anchor diameter 3 mm 4 mm Anchor length l 85 mm 90 mm Hole diameter in component d Bau 4 mm 5 mm Minimum cavity depth h 30 mm 40 mm Nominal drillbit diameter d 0 11 mm 14 mm Max attachment height d a 65 mm 69 mm Breaking force of the anchor Ffailure 1 kN 2 kN 62 Details Application The anchor for mounting curtain rails shelf rails switches and lightweight attachments