NMFC 138560 - Shock/Vibration Mounts in Boxes | Class 77.5

Note 138562: NOTE-Applies only on shock or vibration absorbing devices for mounting articles within shipping containers.

To find the correct freight class for your shipment:

1. State on the BOL: “Rubber and steel shock/vibration mounts, boxed – NMFC 138560 – Class 77.5” to prevent density-based reclass.
2. Bag each mount or pair to control oils and protect steel parts, then use dividers so threaded studs or plates don’t pierce the carton.
3. Use sturdy 200#–275# test corrugated boxes and cap exposed hardware; avoid over‑stacking so rubber elements aren’t permanently compressed.
4. Palletize small cartons in a tight pattern with corner boards; strap and wrap to stop box shift that could abrade rubber surfaces.

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

• Fixed Class 77.5 simplifies quoting and eliminates density disputes, reducing rebills and surprise accessorials.
• Boxed packaging aligns with carrier handling, lowering damage risk to steel hardware and minimizing claim costs.
• Clear NMFC match speeds LTL tendering and improves lane consistency for recurring shipments of mount kits.
• Non‑hazardous components avoid hazmat surcharges and training requirements, streamlining operations.