Dia-Compe thumb jam nut for bicycle brake barrel adjuster
Dia-Compe part number: 64.4
Fits barrel adjusters threaded M6 X 1.0 (which is the size used on most calipers).
9mm Outer Diameter
MADE IN JAPAN
Purchased in bulk so no retail packaging.
NOTE: These are NOS (New-Old Stock) meaning they are brand new, never installed but they are very old inventory. These came in bags of 10 to be used for repairs by bicycle shops. We are selling them individually (because very few people have a need for 10 of them) so the part number tag shown/original packaging is not included.