Classification Details
| NMFC | Description | Class |
|---|---|---|
| 103300.00 | Show more | |
| 103300.01 | Less than 1 | 400 |
| 103300.02 | 1 but less than 2 | 300 |
| 103300.03 | 2 but less than 4 | 250 |
| 103300.04 | 4 but less than 6 | 175 |
| 103300.05 | 6 but less than 8 | 125 |
| 103300.06 | 8 but less than 10 | 100 |
| 103300.07 | 10 but less than 12 | 92.5 |
| 103300.08 | 12 but less than 15 | 85 |
| 103300.09 | 15 but less than 22.5 | 70 |
| 103300.10 | 22.5 but less than 30 | 65 |
| 103300.11 | 30 but less than 35 | 60 |
| 103300.12 | 35 but less than 50 | 55 |
| 103300.13 | 50 or greater | 50 |
How to Determine Your Class
To find the correct freight class for your shipment:
- Determine density before tender: weigh the full shipment (including packaging), calculate cubic feet, and apply the appropriate NMFC 103300 class—lower density yields higher class.
- For cements and calcium silicate in boxes or packages, keep moisture out with liners and shrink wrap, and strap to pallets with corner boards to prevent bag rupture and settling.
- Protect fragile pieces like radiation-shielding windows or glass blocks with rigid inner bracing, foam/honeycomb pads, and crate or double-wall cartons; mark Fragile and Top Load Only.
- Compress and bundle mineral wool, felt, and wood-wool batts to raise density and cut class; wrap to contain fibers and cap sharp edges on sheet-steel silencers to avoid snagging.
Note: All classifications are subject to Item 170. Verify with official NMFC publications for the most current requirements.
Business Value
- Density control can shift shipments into lower classes, directly reducing LTL spend for bulky insulation and batts.
- Precise item descriptions (e.g., mineral wool vs insulating cement) under NMFC 103300 minimize reclass fees and invoice disputes.
- Robust packaging prevents damage to brittle glass shielding and bagged cements, cutting claim rates and project delays.
- Unitizing mixed insulation SKUs on tight, square pallets improves stowability, avoids cubic minimum issues, and speeds cross-dock handling.