These replacement oil cap assemblies are designed for Rockwell hubs and drums rated between 9,000 lb and 16,000 lb. Each cap uses a 3.75" OD thread with 8 TPI and replaces Rockwell part number 12011-1. Common on Rockwell American brake drums built after 1996 and compatible with select Kodiak disc brake hubs using this thread size.

Features

• Direct replacement for Rockwell 12011-1 oil caps
• Typically used on 9K–16K Rockwell axle systems
• 3.75" OD threaded cap — 8 TPI
• Includes cap, sight window, plug, and O-ring
• Also fits certain Kodiak disc brake hubs with matching threads

Specifications

Fitment varies by axle and hub manufacturer. Always compare thread size, diameter, and O-ring seat dimensions before installation.