Manufacturer part number:  W1505WF-A04062

• 15mm diameter
• 20mm lead
• 620mm approx. overall length
• A end machining: 12mm x 10mm, 10mm x 15mm
• B end machining: 10mm x 20mm
  
• Precision ground, probably C5...but not marked
  
• Estimated 470mm of nut travel.
• Note that any mottling, discoloration or other aberrations in pictures 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.