The Housing,bearing Unit, cataloged under National Stock Number 3130-01-004-5101, is classified within Federal Supply Class 3130 (Bearings, Mounted) of the Bearings group. The manufacturer of record is Lockheed Martin Corporation Div Rms. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3130-01-004-5101 |
| Primary Part Number | 1020C0521 |
| Item Name | Housing,bearing Unit |
| FSC / FSG | 3130 / 31 — Bearings, Mounted |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Housing Height | 0.9550 INCHES NOMINAL IN |
| Mounting Hole Type | ROUND, UNTHREADED |
| Material Document and Classification | QQ-A-601 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Mounting Hole Diameter | 0.2010 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Holes Along Width | 1.0600 INCHES NOMINAL IN |
| Base Length | 0.4400 INCHES NOMINAL IN |
| Shaft End Type | OPEN |
| Base Thickness | 0.2500 INCHES NOMINAL IN |
| Bore Diameter | 0.6257 INCHES MINIMUM AND 0.6262 INCHES MAXIMUM IN |
| Material | ALUMINUM ALLOY 356.0 OVERALL |
| Height From Bottom of Base to Bore Centerline | 0.5150 INCHES MINIMUM AND 0.5170 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 |
|---|---|
| 1020C0521 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| Reference | Meaning |
|---|---|
| 1020C0521 | 5/9 Secondary reference Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems |
NSN 3130-01-004-5101 is a Housing,bearing Unit, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 3130, Bearings, Mounted. Status: active.
NSN 3130-01-004-5101 has 1 manufacturer part number on file: 1020C0521 (Lockheed Martin Corporation Div Rms).
Key specifications for 1020C0521: Housing Height: 0.9550 INCHES NOMINAL IN; Mounting Hole Type: ROUND, UNTHREADED; Material Document and Classification: QQ-A-601 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Mounting Hole Diameter: 0.2010 INCHES NOMINAL IN. 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.