NMFC 24850 - Boat Hatches & Covers | Class By Density

To find the correct freight class for your shipment:

1. Calculate shipment density before quoting: weigh the packed box or crate and divide by cubic feet (e.g., 48x40x20 in at 180 lb = 8.1 PCF). Use the density to select the correct class under Item 170.
2. Choose sturdy crating for large or framed hatches to prevent flexing. Block and brace edges, protect handles and latches, and bag loose hardware to keep it inside the crate.
3. Control moisture for marine components: wrap in a vapor barrier, add desiccant, and mark Keep Dry. This limits corrosion on aluminum hardware and hinges during transit.
4. Document clearly on the BOL: “Hatches or Hatch Covers, with/without frames, boxed/crated, NMFC 24850,” include total weight and calculated PCF to avoid reclass delays.

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

• Density-based rating lets you reduce class (and cost) by right-sizing crates, minimizing void space, and using lighter dunnage without sacrificing protection.
• Proper blocking and crating lowers damage rates on fragile hatch corners and lenses, cutting claim costs and keeping projects on schedule for refits or new builds.
• Accurate NMFC and density on the BOL reduces inspections, reclass fees, and rebills, improving carrier relations and shortening transit-to-invoice cycle time.
• Consolidating frames, hinges, and seals in one crate reduces handling touches and accessorials, while boxed small hatches can ride on a pallet for faster cross-dock moves.