The Socks,extreme Cold Weather, cataloged under National Stock Number 8415-01-679-4985, is classified within Federal Supply Class 8415 (Clothing, Special Purpose) of the Clothing, Individual Equipment, and Insignia group. The manufacturer of record is Frm Socks Llc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 8415-01-679-4985 |
| Primary Part Number | FR20078-S |
| Item Name | Socks,extreme Cold Weather |
| FSC / FSG | 8415 / 84 — Clothing, Special Purpose |
| Manufacturer | Frm Socks Llc |
| Status | ACTIVE |
| Size | SMALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| FR20078-S PRIMARY | Frm Socks Llc (USA) |
| U4050-S PRIMARY | Cabot Hosiery Mills, Inc Dba Darn Tough Vermont (USA) |
| 812-HOTC-S PRIMARY | Black Canyon Concepts, Llc (USA) |
| Reference | Meaning |
|---|---|
| 14050 | 5/9 Secondary reference Cabot Hosiery Mills, Inc Dba Darn Tough Vermont |
NSN 8415-01-679-4985 is a Socks,extreme Cold Weather, manufactured by Frm Socks Llc, classified under FSC 8415, Clothing, Special Purpose. Status: active.
NSN 8415-01-679-4985 has 3 manufacturer part numbers on file: FR20078-S (Frm Socks Llc), U4050-S (Cabot Hosiery Mills, Inc Dba Darn Tough Vermont), 812-HOTC-S (Black Canyon Concepts, Llc).
Key specifications for FR20078-S: Size: SMALL; Special Features: SOCKS,EXTREME COLD WEATHER/MOUNTAINEERING MERINO WOOL. 1 specification is documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.