Pioneer Cables S-1123 Clutch Flywheel Bolt

Clutch Flywheel Bolt for GM V8 Applications

Pioneer Cables S-1123 is a clutch flywheel bolt for select Chevrolet, Pontiac, Buick, Cadillac, and Oldsmobile applications that use a 6-bolt flywheel pattern. It is specified with a 7/16-20 x 1.00 inch bolt measurement in the fitment notes, making it a direct-match hardware choice for many GM rear-wheel-drive and performance platforms.

• Brand: Pioneer Cables
• Part number: S-1123
• Part type: clutch flywheel bolt
• Hex head drive type for standard service tools
• Thread diameter listed at 0.563 and 19.22 mm in the product data
• Head thickness listed at 0.688
• Fits 1967-1997 Chevrolet Camaro, N/A, 6 bolts; bolt measurement: 7/16 - 20 x 1.00"
• Fits 1968-1979 Pontiac Firebird, N/A, 6 bolts; bolt measurement: 7/16 - 20 x 1.00"
• Fits 1968-1980 Oldsmobile Cutlass, N/A, 6 bolts; bolt measurement: 7/16 - 20 x 1.00"

Detailed Fitment and Application

This clutch flywheel bolt is used on vehicles that require secure flywheel-to-crankshaft fastening during clutch service or flywheel replacement. The fitment list covers a broad range of classic and late-model GM platforms, including Chevrolet Camaro, Pontiac Firebird, and Oldsmobile Cutlass applications, along with additional Buick, Cadillac, Chevrolet, and Pontiac models listed in the vehicle table. Part number S-1123 is a practical match when the original hardware calls for a 6-bolt flywheel setup with 7/16-20 x 1.00 inch dimensions.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Loose or worn flywheel fasteners during clutch service
• Incorrect hardware size when replacing a flywheel
• Fitment issues on 6-bolt GM flywheel patterns
• Service delays caused by missing or damaged original bolts
• Repeat drivetrain noise from improperly secured flywheel hardware

Installation Notes and Tips

Verify the flywheel bolt pattern, thread size, and length against the vehicle’s original specification before installation. Clean the threaded holes and inspect the flywheel and crankshaft mating surfaces for damage or contamination. Use the correct tightening sequence and torque specification from the service manual for the exact vehicle application.

Quality Assurance

Pioneer Cables supplies this hardware as a fitment-specific replacement part for listed GM applications. Confirm the vehicle year, make, model, and 6-bolt flywheel configuration before ordering to ensure proper application match.