The Bearing,washer,thrust, cataloged under National Stock Number 3120-01-009-2977, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 24 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-009-2977 |
| Primary Part Number | 2541556 |
| Item Name | Bearing,washer,thrust |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES RIGHT SIDE |
| Surface Finish | 125.0 MICROINCHES LARGEST OUTSIDE DIAMETER |
| Surface Finish | 125.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY |
| Surface Finish | 125.0 MICROINCHES LEFT SIDE |
| Surface Finish | 63.0 MICROINCHES COUNTERBORE DIAMETER |
| Corner Shape | SQUARE THIRD INSIDE CORNER |
| Corner Shape | SQUARE FOURTH INSIDE CORNER |
| Corner Shape | SQUARE FIRST INSIDE CORNER |
| Corner Shape | ROUND SECOND OUTSIDE CORNER |
| Corner Shape | ROUND FIRST OUTSIDE CORNER |
| Corner Shape | ROUND SECOND INSIDE CORNER |
| Surface Treatment Document and Classification | MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE INSIDE DIAMETER SURFACE OF BODY |
| Bearing Surface Hole Diameter | 0.2500 INCHES NOMINAL FIRST IN |
| Overall Thickness | 0.4750 INCHES NOMINAL IN |
| Style Designator | ROUND |
| Material Document and Classification | QQ-A-250/11,T651 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Diameter | 6.7300 INCHES NOMINAL IN |
| Outside Diameter | 0.8750 INCHES NOMINAL IN |
| Counterbore Depth | 0.1500 INCHES NOMINAL IN |
| Bearing Surface Hole Quantity | 6 FIRST |
| Counterbore Diameter | 7.5020 INCHES MINIMUM AND 7.5080 INCHES MAXIMUM IN |
| Surface Treatment | OXIDE FILM INSIDE DIAMETER SURFACE OF BODY |
| Material | ALUMINUM ALLOY 6061 OVERALL |
| Center Hole Shape Style | ROUND |
| 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 |
|---|---|
| 2541556 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 3120-01-009-2977 is a Bearing,washer,thrust, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-009-2977 has 1 manufacturer part number on file: 2541556 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 2541556: Surface Finish: 125.0 MICROINCHES RIGHT SIDE; Surface Finish: 125.0 MICROINCHES LARGEST OUTSIDE DIAMETER; Surface Finish: 125.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY; Surface Finish: 125.0 MICROINCHES LEFT SIDE. 24 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.