The Lumber,softwood,timber, cataloged under National Stock Number 5510-00-550-6840, is classified within Federal Supply Class 5510 (Lumber and Related Basic Wood Materials) of the Lumber, Millwork, Plywood, and Veneer group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5510-00-550-6840 |
| Item Name | Lumber,softwood,timber |
| FSC / FSG | 5510 / 55 — Lumber and Related Basic Wood Materials |
| Status | ACTIVE |
| Width-Location and Measuring Method | 14.000 INCHES NOMINAL OVERALL SPECIFIED IN |
| Measuring Method and Length | 10.000 FEET MINIMUM RANDOM FT |
| Service Usage | TIMBERS AND IMPORTANT STRUCTURAL MEMBERS IN CONTACT WITH GROUND OR FRESH WATER |
| Species-Grade and Grading Association | DOUGLAS-FIR, COASTAL NO. 1 STRUCTURAL WEST COAST LUMBER INSPECTION BUREAU OR DOUGLAS-FIR, COASTAL NO. 1 WESTERN WOOD PRODUCTS ASSOCIATION OR HEMLOCK, WESTERN NO. 1 STRUCTURAL WEST COAST LUMBER INSPECTION BUREAU OR HEMLOCK, WESTERN NO. 1 WESTERN WOOD PRODUCTS ASSOCIATION OR LARCH NO. 1 WESTERN WOOD PRODUCTS ASSOCIATION OR PINE, SOUTHERN NO. 1 SR TIMBERS SOUTHERN PINE INSPECTION BUREAU |
| Supplementary Features | TT-W-571,TABLE1,UNIT OF ISSUE BF |
| Specification/standard Data | 81348-MM-L-751 GOVERNMENT SPECIFICATION |
| Treatment Type | PRESERVATIVE, TT-W-571 |
| Nondefinitive Spec/std Data | 3 TABLE |
| Preservative Solution Type | AMMONIACAL COPPER ARSENITE OR CHROMATED COPPER ARSENATE, TYPE I, II OR III OR COAL-TAR CREOSOTE OR CREOSOTE COAL-TAR SOLUTION OR CREOSOTE PETROLEUM SOLUTION OR PENTACHLOROPHENOL IN HEAVY PETROLEUM SOLVENT |
| Typical Wood Products Use | PRESERVATIVE TREATED BEAMS, STRINGERS, POSTS, TIMBERS, COLUMNS AND STRUTS WHERE CREOSOTE OR OIL-BORNE PRESERVATIVES ARE REQUIRED FOR USE IN FRESH WATER GROUND CONTACT |
| Thickness-Location and Measuring Method | 12.000 INCHES NOMINAL OVERALL SPECIFIED IN |
| Surface Condition Degree | ROUGH-UNSANDED FULL LENGTH |
| Random Length | 10 FT AND LONGER WITH A MAX OF 10 PCT TO BE 10 FT LONG AND A MIN OF 50 PCT TO BE 14 FT AND LONGER FT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MM-L-751 | 5/9 Secondary reference U.S. Government activity |
| PS 20-05 | 3/1 Design control — primary reference American Lumber Standard Committee Inc |
NSN 5510-00-550-6840 is a Lumber,softwood,timber, classified under FSC 5510, Lumber and Related Basic Wood Materials. Status: active.
Key specifications for 5510-00-550-6840: Width-Location and Measuring Method: 14.000 INCHES NOMINAL OVERALL SPECIFIED IN; Measuring Method and Length: 10.000 FEET MINIMUM RANDOM FT; Service Usage: TIMBERS AND IMPORTANT STRUCTURAL MEMBERS IN CONTACT WITH GROUND OR FRESH WATER; Species-Grade and Grading Association: DOUGLAS-FIR, COASTAL NO. 1 STRUCTURAL WEST COAST LUMBER INSPECTION BUREAU OR DOUGLAS-FIR, COASTAL NO. 1 WESTERN WOOD PRODUCTS ASSOCIATION OR HEMLOCK, WESTERN NO. 1 STRUCTURAL WEST COAST LUMBER INSPECTION BUREAU OR HEMLOCK, WESTERN NO. 1 WESTERN WOOD PRODUCTS ASSOCIATION OR LARCH NO. 1 WESTERN WOOD PRODUCTS ASSOCIATION OR PINE, SOUTHERN NO. 1 SR TIMBERS SOUTHERN PINE INSPECTION BUREAU. 13 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.