Description and manufacturer part number are incorrect. But the picture is correct. I don't know what it is, but it's not a D3 stamp. This is a piece of a shaft and a bushing of some sort.
Enhance Precision and Durability π§ with Muzerdo 115PCS Metric Bearing Rethreading Kit
3 Review
LEE PRECISION 90861 Carbide Factory
πͺ Carbon Wooden Rethreading Drill by Drill America
π« UNEF 22LR Round for Right-Handed Shooters
πͺ Bi-Metal Cutting Blades: Imachinist S933414 - Enhancing Precision and Performance
10 Review
Enhanced Cutting Efficiency with Olson FB23370DB 0 025 2 Inch Blade
Olson 80 Inch Blade FB14580DB-025
πͺ DEWALT DW3984C Portable Blade Set of 3-Pack