The Housing,bearing Unit, cataloged under National Stock Number 3130-01-025-7866, is classified within Federal Supply Class 3130 (Bearings, Mounted) of the Bearings group. The manufacturer of record is Roller Bearing Co of America, Inc Div Pic Design. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3130-01-025-7866 |
| Primary Part Number | AA1-4 |
| Item Name | Housing,bearing Unit |
| FSC / FSG | 3130 / 31 — Bearings, Mounted |
| Manufacturer | Roller Bearing Co of America, Inc Div Pic Design |
| Status | ACTIVE |
| Flange Thickness | 0.2500 INCHES NOMINAL IN |
| Overall Outside Diameter | 1.5000 INCHES NOMINAL IN |
| Bolt Circle Diameter | 1.1240 INCHES NOMINAL IN |
| Shaft End Type | OPEN |
| Bore Diameter | 0.3748 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN |
| Material | ALUMINUM HOUSING |
| Housing Length | 0.7500 INCHES NOMINAL IN |
| Housing Diameter | 0.7500 INCHES NOMINAL 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 |
|---|---|
| GA500AL6-12B | Northrop Grumman Systems Corporation (USA) |
| AA1-4 PRIMARY | Roller Bearing Co of America, Inc Div Pic Design (USA) |
NSN 3130-01-025-7866 is a Housing,bearing Unit, manufactured by Roller Bearing Co of America, Inc Div Pic Design, classified under FSC 3130, Bearings, Mounted. Status: active.
NSN 3130-01-025-7866 has 2 manufacturer part numbers on file: GA500AL6-12B (Northrop Grumman Systems Corporation), AA1-4 (Roller Bearing Co of America, Inc Div Pic Design).
1 possible match (shared part number, not a government interchangeability claim): 7930-01-294-1116. Verify interchangeability with system specifications before substitution.
Key specifications for AA1-4: Flange Thickness: 0.2500 INCHES NOMINAL IN; Overall Outside Diameter: 1.5000 INCHES NOMINAL IN; Bolt Circle Diameter: 1.1240 INCHES NOMINAL IN; Shaft End Type: OPEN. 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.