Barient 21 Single Speed Winch 5 1/2" Base new It measures 5” x 4

It measures 5” x 4 1/4” x 2 1/2” tall

Width between the white rollers is 1 3/8"

that bolt hole diameter is 5/16”

The track width is exactly 1" so I would size down and it would fit a 7/8" track

Barient 21 Single Speed Winch 5 1/2" Base new It measures 5” x 4Vintage Barient 21 single speed sailboat winch made in the USA. Aluminum construction with a stainless steel top cap. Measurements (approx.): Base Diameter: 5 1 2 Top Diameter: 4 1 2 Overall Height: 5 Bolt length apart (middle to middle) 2 1 4 The winch shows normal cosmetic wear, oxidation, and signs of marine use. Internal gears are present as shown in the photos. It is being sold exactly as pictured. Please review all photos to determine condition