The Bearing,sleeve, cataloged under National Stock Number 3120-00-182-8530, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Timken Gears & Services Inc. Div Philadelphia Gear. Government technical data includes 10 specifications, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-00-182-8530 |
| Primary Part Number | 657D678PC8 |
| Item Name | Bearing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | Timken Gears & Services Inc. Div Philadelphia Gear |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY |
| Surface Finish | 32.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY |
| Corner Shape | SQUARE ALL CORNERS |
| Body Outside Diameter | 14.9990 INCHES MINIMUM AND 15.0000 INCHES MAXIMUM IN |
| Style Designator | SEGMENTED, PLAIN, NO OUTSIDE FLANGES |
| Material Document and Classification | QQ-T-390 FED SPEC SINGLE MATERIAL RESPONSE INNER LAYER |
| Material Document and Classification | QQ-S-635 FED SPEC SINGLE MATERIAL RESPONSE OUTER LAYER |
| Body Inside Diameter | 13.0140 INCHES MINIMUM AND 13.0160 INCHES MAXIMUM IN |
| Material | TIN ALLOY UNS L13840 INNER LAYER |
| Material | STEEL COMP 1020 OUTER LAYER |
| 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 |
|---|---|
| 662E709 PIECE 52 | Timken Gears & Services Inc. Div Philadelphia Gear (USA) |
| 657D678PC8 PRIMARY | Timken Gears & Services Inc. Div Philadelphia Gear (USA) |
| 657D678-008 | Timken Gears & Services Inc. Div Philadelphia Gear (USA) |
| Reference | Meaning |
|---|---|
| 657D678-008 | 5/9 Secondary reference General Electric Company |
| 657D678PC8 | 5/9 Secondary reference General Electric Company |
| 662E709 PIECE 52 | 5/9 Secondary reference General Electric Company |
NSN 3120-00-182-8530 is a Bearing,sleeve, manufactured by Timken Gears & Services Inc. Div Philadelphia Gear, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-00-182-8530 has 3 manufacturer part numbers on file: 662E709 PIECE 52 (Timken Gears & Services Inc. Div Philadelphia Gear), 657D678PC8 (Timken Gears & Services Inc. Div Philadelphia Gear), 657D678-008 (Timken Gears & Services Inc. Div Philadelphia Gear).
Key specifications for 657D678PC8: Surface Finish: 63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY; Surface Finish: 32.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY; Corner Shape: SQUARE ALL CORNERS; Body Outside Diameter: 14.9990 INCHES MINIMUM AND 15.0000 INCHES MAXIMUM IN. 10 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.