46mm UV Lens Filter - HD MCUV Scratch-Resistant Ultraviolet Protection Filters
SKU: KF01.982
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Yes it is threaded on the front side.
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If it is the correct size. I have a K&F on my 70-200mm f4 L IS USM (67mm)
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In addition to lens protection I specially like the K&F design with CNC precision-curved anti-slip teeth on the rim. If your Tamron lens cap is all smooth and not the centre-pinch snap on type then I don't think it will fit because of the corrugated teeth.