Manufacturer part number:  W6309-84DTY-C3Z12

• 63mm diameter
• 12mm lead
• Overall length approximately 1490mm
• Custom/non-standard end machining on both ends. 
  
• Very heavy duty double type nut, zero backlash measuring approx. 250mm in length.
  
• Precision ground, C3 rated.
• Zero backlash nut.
• Note that any mottling, discoloration or other aberrations in picture are GREASE applied to screw for shipping/storage.  NSK packs all of its products very carefully, and we removed this screw from factory packaging to photograph it.  It was wiped down a bit, but no attempt was made to completely clean it.  These NSK screws are factory new, factory perfect and absolutely BEAUTIFUL.