The Bearing,plain,self-Aligning, cataloged under National Stock Number 3120-00-702-3142, 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 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3120-00-702-3142 |
| Primary Part Number | 4M71A4 |
| Item Name | Bearing,plain,self-Aligning |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Inner Member Width | 0.3380 INCHES MINIMUM AND 0.3430 INCHES MAXIMUM IN |
| Outer Member Width | 0.2450 INCHES NOMINAL IN |
| Style Designator | WITHOUT INSERT OR LINER |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE INNER MEMBER |
| Surface Treatment | CADMIUM OUTER RACE MEMBER |
| Surface Treatment | CHROMIUM INNER MEMBER |
| Static Radial Load Rating | 6000 POUNDS LBS |
| Bore Diameter | 0.2495 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN |
| Material | COPPER ALLOY OUTER RACE MEMBER |
| Material | STEEL COMP E52100 INNER MEMBER |
| Outer Member Outside Diameter | 0.6557 INCHES MINIMUM AND 0.6562 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 |
|---|---|
| 4M71A4 | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| BLN4003C | 3/2 Design control — primary reference U.S. Government activity |
NSN 3120-00-702-3142 is a Bearing,plain,self-Aligning, manufactured by The Boeing Company Div Defense, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-00-702-3142 has 1 manufacturer part number on file: 4M71A4 (The Boeing Company Div Defense).
Key specifications for 4M71A4: Inner Member Width: 0.3380 INCHES MINIMUM AND 0.3430 INCHES MAXIMUM IN; Outer Member Width: 0.2450 INCHES NOMINAL IN; Style Designator: WITHOUT INSERT OR LINER; Material Document and Classification: 66 FED STD SINGLE MATERIAL RESPONSE INNER MEMBER. 11 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.