This is a replacement 5.5" bolt and wedge nut for a vintage Tuf Neck or Pro Neck stem for your old school vintage BMX bike.
Coarse thread (16) version.
Make sure you know which length you need. Some versions of the stems used 6" bolt. Make sure your quill is compatible with this wedge. Some of the newer versions of the Tuf/Pro Necks use a different style quill and wedge.
Black oxide hardened steel.
Shipping is free in the lower 48 states.