Manufacturer part number:  W3618WF-1PX-C5Z25

• 36mm diameter
• 25mm lead
• Would estimate 1800mm of travel for nut.
• 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.