The Housing,bearing Unit, cataloged under National Stock Number 3130-01-307-9037, is classified within Federal Supply Class 3130 (Bearings, Mounted) of the Bearings group. The manufacturer of record is Meggitt (north Hollywood), Inc. Dba Meggitt Control Systems Div Meggitt Defense Systems, Inc.. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3130-01-307-9037 |
| Primary Part Number | 331901 |
| Item Name | Housing,bearing Unit |
| FSC / FSG | 3130 / 31 — Bearings, Mounted |
| Manufacturer | Meggitt (north Hollywood), Inc. Dba Meggitt Control Systems Div Meggitt Defense Systems, Inc. |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 1,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE HOUSING |
| Mounting Hole Type | ROUND, UNTHREADED |
| Mounting Hole Diameter | 0.2170 INCHES MINIMUM AND 0.2240 INCHES MAXIMUM IN |
| Surface Treatment | ANODIZE HOUSING |
| Bore Diameter | 0.8205 INCHES MINIMUM AND 0.8210 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 |
|---|---|
| 331901 PRIMARY | Meggitt (north Hollywood), Inc. Dba Meggitt Control Systems Div Meggitt Defense Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 331901 | 5/9 Secondary reference Howden Fluid Systems |
NSN 3130-01-307-9037 is a Housing,bearing Unit, manufactured by Meggitt (north Hollywood), Inc. Dba Meggitt Control Systems Div Meggitt Defense Systems, Inc., classified under FSC 3130, Bearings, Mounted. Status: active.
NSN 3130-01-307-9037 has 1 manufacturer part number on file: 331901 (Meggitt (north Hollywood), Inc. Dba Meggitt Control Systems Div Meggitt Defense Systems, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 3120-01-348-0461. Verify interchangeability with system specifications before substitution.
Key specifications for 331901: Surface Treatment Document and Classification: MIL-A-8625,TYPE 1,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE HOUSING; Mounting Hole Type: ROUND, UNTHREADED; Mounting Hole Diameter: 0.2170 INCHES MINIMUM AND 0.2240 INCHES MAXIMUM IN; Special Features: ITEM IS USED ON A PUMP UNIT ON THE KC135 ACFT. 5 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.