Porsche Gear Oil GL4 SAE 85W-90 1L 20016 616211SET The thread is 3/8-24 NF

The thread is 3/8-24 NF that is common in after market flanges

This number superseded 999

356B and 356C (1956-1965) Coupe models with manual sunroofs

Porsche Underbody panel

Helps ensure smooth deck lid operation

Porsche Gear Oil GL4 SAE 85W-90 1L 20016 616211SET The thread is 3/8-24 NFPorsche Gear Oil (GL4) SAE 85W 90 (1L). Gear Oil (GL 4) SAE 85W 90 is a high performance lubricant specifically formulated for use in manual transmissions, differentials, and transfer cases. It is designed to provide optimal protection and performance under a wide range of operating conditions. Key Features: GL 4 Specification: Meets the GL 4 specification, ensuring compatibility with a variety of gear types and operating conditions. SAE 85W 90