Various Manufacturers Stainless Socket Cap Screw 4 mm x 20 mm

Various Manufacturers Stainless Socket Cap Screw 4 mm x 20 mm
(6 x 16 mm size shown)
$0.75
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Details

Use this as your B tension screw on Deore rear derailleur, enabling use of 11 (or 12t)-36t 10 speed cassette!

Part Numbers

MPN Store SKU
BO3025 BO4020