ACDelco 11589283 GM Genuine Parts M12x1.75x126 Heavy Hex Flange Multi-Purpose Bolt

The ACDelco 11589283 is a GM Genuine Parts heavy hex flange multi-purpose bolt with an M12 x 1.75 thread and 126mm length. This is a true OEM fastener designed, engineered, and tested to General Motors' rigorous factory standards, making it the correct replacement for worn or non-reusable hardware in GM vehicles.

Key Features:

• Thread Size: M12 x 1.75 metric coarse thread
• Length: 126mm (approximately 4.96 in.) shank length
• Head Style: Heavy hex flange — integrated flange provides a built-in bearing surface without a separate washer
• Grade: Grade 8 / high-strength steel construction
• Finish: Machined silver finish
• OEM Quality: GM Genuine Part — same specification as installed on the production line
• Replaces: GM part number 11900291
• Also referenced as a transmission mount bracket bolt (Trans Mount Bracket Bolt)

This bolt is a single-use, non-reusable fastener — once removed, it must be replaced with a new unit. It is sold individually. As a GM Genuine Part, it meets the same engineering specifications as the original hardware and is backed by General Motors.