605094 - Adaptor, Wiper Arm to Spindle, Series 2a and 3 only Land-Rover Series 2a and 3. £9.50 Quantity: at £9.50 each Add To Basket 2 in stock. Adaptor, Wiper Arm to Spindle, Series 2a and 3 only Correct wiper arm adaptor for late Series 2a and all Series 3 models. STC 987 supplied by other vendors is incorrect for Series models, the 90/110 Defender spindle is a smaller diameter. For improved functionality, file a flat spot on the spindle where the locking grub screw engages.