Suspension and Components› Shocks, Struts, Coil-Overs and Components
QA1 Precision Products, Inc
QA1 Metric Jam Nut - M12-1.25 Left Hand - 19mm Hex 6mm Wide - Steel
SKU: Q00B MJNL12S-1
Beginner — under 30 min
Description
Part #: MJNL12S-1
QA1 offers steel jam nuts for the industrial market. Steel jam nuts are made with high carbon steel and a protective coating and reference ANSI B18.2.2-1972.
Features:
- Standard and metric options
- Available in steel or aluminum
- Clear anodized
Metric steel jam nut with left hand M12-1.75 6H threads with a 19mm hex.
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
MIA's Description
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | QA1 Precision Products, Inc |
| Part Number | Q00B MJNL12S-1 |
Videos
How To: Install a QA1 GM A Body Rear Pro Coil Coilover System
How To: Installing QA1 GM Pro Coil Coilover Shock Systems
Front End Setup For Drag Racing | QA1 Tech
How To Rebuild a QA1 Circle Track Monotube Shock
Rebuilding a QA1 Circle Track Twin Tube Shock - QA1 Tech
How To: Install a QA1 Rear Pro Coil Coilover System on a GM G-Body
How To Install QA1 Front Coilovers (Parts Setup and Install)
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return Policy