The Adapter,tool,well Drilling and S, cataloged under National Stock Number 3820-01-338-9963, is classified within Federal Supply Class 3820 (Mining, Rock Drilling, Earth Boring, and Related Equipment) of the Construction, Mining, Excavating Equipment group. The manufacturer of record is Atlas Copco. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3820-01-338-9963 |
| Primary Part Number | 855017W0479 |
| Item Name | Adapter,tool,well Drilling and S |
| FSC / FSG | 3820 / 38 — Mining, Rock Drilling, Earth Boring, and Related Equipment |
| Manufacturer | Atlas Copco |
| Status | ACTIVE |
| First End Thread Direction | RIGHT-HAND |
| First End Thread Diameter | 2.875 INCHES NOMINAL IN |
| Largest Outside Diameter | 4.500 INCHES NOMINAL IN |
| Design Type | BOX-TO-PIN |
| Second End Thread Series Modification | MODIFIED BY 2 IN. TAPER PER FOOT; 4 THREADS PER INCH IN |
| First End Thread Series | API IF |
| Second End Thread Direction | RIGHT-HAND |
| Second End Thread Location | EXTERNAL |
| Second End Step Thread Feature | NOT INCLUDED |
| Construction | HOLLOW |
| Second End Thread Diameter | 2.875 INCHES NOMINAL IN |
| First End Thread Location | INTERNAL |
| Second End Thread Series | API IF |
| First End Thread Series Modification | MODIFIED BY 2 IN. TAPER PER FOOT; 4 THREADS PER INCH IN |
| First End Step Thread Feature | NOT INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 855017W0479 PRIMARY | Atlas Copco (USA) |
| Reference | Meaning |
|---|---|
| 855017W0479 | 5/9 Secondary reference Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service |
NSN 3820-01-338-9963 is a Adapter,tool,well Drilling and S, manufactured by Atlas Copco, classified under FSC 3820, Mining, Rock Drilling, Earth Boring, and Related Equipment. Status: active.
NSN 3820-01-338-9963 has 1 manufacturer part number on file: 855017W0479 (Atlas Copco).
Key specifications for 855017W0479: First End Thread Direction: RIGHT-HAND; First End Thread Diameter: 2.875 INCHES NOMINAL IN; Largest Outside Diameter: 4.500 INCHES NOMINAL IN; Design Type: BOX-TO-PIN. 15 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.