Manufacturer part number:  W4004WF-14D-C1Z10

• 40mm diameter
• 10mm lead
• Would estimate 400mm of travel for nut.
• Precision ground, C3 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.