Manufacturer part number:  W4406W-10P-C0Z12.7

• 44mm diameter
• 12.7mm (1/2") lead
• 775mm approx. overall length with approx. 600mm of ball screw thread
• Custom/non-standard end machining on one end as shown.  You should be able to machine to your requirement.  Other end has hex termination.
• Would estimate 450mm of unimpeded travel for nut.
  
• Extreme precision ground, C1/C0 rated.
• Heavy duty 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.