The Bearing Unit,plain, cataloged under National Stock Number 3130-01-161-5559, is classified within Federal Supply Class 3130 (Bearings, Mounted) of the Bearings group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3130-01-161-5559 |
| Primary Part Number | 123-4642962 ITEM 2 |
| Item Name | Bearing Unit,plain |
| FSC / FSG | 3130 / 31 — Bearings, Mounted |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Lubrication Fitting Type | CUP |
| Housing Height | 11.2500 INCHES NOMINAL IN |
| Mounting Hole Type | ROUND, UNTHREADED |
| Mounting Hole Diameter | 1.3120 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Holes Along Width | 9.2500 INCHES NOMINAL IN |
| Housing Width | 12.0000 INCHES NOMINAL IN |
| Base Length | 17.5000 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Holes Along Length | 14.7500 INCHES NOMINAL IN |
| Alignment Type | RIGID |
| Shaft End Type | OPEN |
| Base Thickness | 1.8800 INCHES NOMINAL IN |
| Bore Diameter | 3.0000 INCHES MINIMUM AND 3.0010 INCHES MAXIMUM IN |
| Material | COPPER ALLOY 957 OR COPPER ALLOY 958 OVERALL |
| Housing Length | 17.5000 INCHES NOMINAL IN |
| Height From Bottom of Base to Bore Centerline | 8.0000 INCHES NOMINAL IN |
| Lubrication Fitting Angle From Horizontal Centerline | 90.0 DEGREES NOMINAL |
| Load Capability Type | RADIAL |
| 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 |
|---|---|
| 123-4642962 ITEM 2 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 87434-2503 ITEM 2 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3130-01-161-5559 is a Bearing Unit,plain, manufactured by Naval Sea Systems Command, classified under FSC 3130, Bearings, Mounted. Status: active.
NSN 3130-01-161-5559 has 1 manufacturer part number on file: 123-4642962 ITEM 2 (Naval Sea Systems Command).
Key specifications for 123-4642962 ITEM 2: Lubrication Fitting Type: CUP; Housing Height: 11.2500 INCHES NOMINAL IN; Mounting Hole Type: ROUND, UNTHREADED; Mounting Hole Diameter: 1.3120 INCHES NOMINAL IN. 17 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.