The Roller,linear-Rotary Motion, cataloged under National Stock Number 3120-01-487-1663, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-487-1663 |
| Primary Part Number | 122-7312139 PC 8 |
| Item Name | Roller,linear-Rotary Motion |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Style Designator | PLAIN |
| Outside Diameter | 12.000 INCHES NOMINAL IN |
| Chamfer/radius of Outside Corner | 0.250 IN. RADIUS IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Material | STEEL |
| Face Width | 6.677 INCHES MINIMUM AND 6.697 INCHES MAXIMUM IN |
| Bore Inside Diameter | 3.374 INCHES MINIMUM AND 3.375 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 122-7312139 PC 8 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 122-7312139 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3120-01-487-1663 is a Roller,linear-Rotary Motion, manufactured by Naval Sea Systems Command, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-487-1663 has 1 manufacturer part number on file: 122-7312139 PC 8 (Naval Sea Systems Command).
3 possible matches (shared part number, not a government interchangeability claim): 3120-01-487-1664, 3120-01-487-1671, 5365-01-540-0800. Verify interchangeability with system specifications before substitution.
Key specifications for 122-7312139 PC 8: Style Designator: PLAIN; Outside Diameter: 12.000 INCHES NOMINAL IN; Chamfer/radius of Outside Corner: 0.250 IN. RADIUS IN; Casehardening Indicator: NOT CASEHARDENED. 7 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.