NMFC 177930 - Overhead Door Tension Springs | Class 55

To find the correct freight class for your shipment:

1. List NMFC 177930 and Class 55 on the BOL; describe as boxed overhead door tension coil springs for accurate rating.
2. Use heavy-duty corrugated boxes with sleeves or end caps; secure coil ends and add blocking so sharp tips don’t pierce the carton.
3. Keep matched pairs together and label left/right wind or color code; include part numbers to prevent installer mismatches and reships.
4. Palletize long boxes flat, add corner boards, and stretch-wrap; keep boxes within the pallet footprint to prevent bending and overhang damage.

Note: All classifications are subject to Item 170. Verify with official NMFC publications for the most current requirements.

• Fixed Class 55 means no density calculations, speeding quotes and reducing reclass disputes.
• Boxed packaging stacks cleanly, lowering handling time and damage claims on coiled steel components.
• Non-hazardous status broadens carrier options and avoids hazmat fees or paperwork delays.
• Clear pair and size labeling streamlines receiving and jobsite kitting, cutting labor and turnaround time.