The Bushing,sleeve, cataloged under National Stock Number 3120-01-121-8577, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3120-01-121-8577 |
| Primary Part Number | 74A410521-2001 |
| Item Name | Bushing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES INTERMEDIATE LAYER |
| Corner Shape | SQUARE ALL CORNERS |
| Body Outside Diameter | 2.0640 INCHES MINIMUM AND 2.0655 INCHES MAXIMUM IN |
| Style Designator | SOLID, PLAIN, NO OUTSIDE FLANGES |
| Material Document and Classification | QQ-C-530,HT FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Body Inside Diameter | 1.8400 INCHES MINIMUM AND 1.8450 INCHES MAXIMUM IN |
| Test Data Document | 76301-PS21202 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Material | COPPER ALLOY 172 OR COPPER ALLOY 173 OVERALL |
| 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 |
|---|---|
| 74A410521-2001 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 10107787 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 3120-01-121-8577 is a Bushing,sleeve, manufactured by The Boeing Company Div Defense, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-121-8577 has 1 manufacturer part number on file: 74A410521-2001 (The Boeing Company Div Defense).
Key specifications for 74A410521-2001: Surface Finish: 125.0 MICROINCHES INTERMEDIATE LAYER; Corner Shape: SQUARE ALL CORNERS; Body Outside Diameter: 2.0640 INCHES MINIMUM AND 2.0655 INCHES MAXIMUM IN; Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES. 8 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.