Manufacturer part number:  W4510-160D-C5Z12

• 45mm diameter
• 12mm lead
• Overall length: 1360
  
• Would estimate 840mm of travel for nut.
• A end machining: 40mm x 45mm, 35mm x 65mm
  
• B end machining: 40mm x 45mm
• Precision ground, C5 rated.
• 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.