The B6431 is a short link road in the suburbs of Stalybridge and Dukinfield. Owing to the road's short length its history is not fully known. However, it was originally unclassified and seems to have gained its number by the late 1940s.
The road starts on the B6175 by Morrisons. Outbound traffic follows Sandy Lane whilst inbound traffic follows the parallel Hyde Street. After the two one-way roads join we continue along Sandy Lane. The road straightens out and we go over the River Tame to enter an industrial area. After going over the Huddersfield Narrow Canal and under two adjacent railway bridges carrying the lines west of Stalybridge station the road becomes residential once more, ending shortly afterwards at traffic lights on the A635.