The Bearing Unit,ball, cataloged under National Stock Number 3130-01-021-1383, is classified within Federal Supply Class 3130 (Bearings, Mounted) of the Bearings group. The manufacturer of record is New Hampshire Ball Bearings Inc Div Precision Division. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3130-01-021-1383 |
| Primary Part Number | AS8221 |
| Item Name | Bearing Unit,ball |
| FSC / FSG | 3130 / 31 — Bearings, Mounted |
| Manufacturer | New Hampshire Ball Bearings Inc Div Precision Division |
| Status | ACTIVE |
| Seal Type | CONTACT |
| Seal Location | BOTH ENDS |
| Alignment Type | RIGID |
| Bore Diameter | 0.1248 INCHES MINIMUM AND 0.1250 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 |
|---|---|
| AS8221 PRIMARY | New Hampshire Ball Bearings Inc Div Precision Division (USA) |
| Reference | Meaning |
|---|---|
| 317201-02 | 5/9 Secondary reference U.S. Government activity |
NSN 3130-01-021-1383 is a Bearing Unit,ball, manufactured by New Hampshire Ball Bearings Inc Div Precision Division, classified under FSC 3130, Bearings, Mounted. Status: active.
NSN 3130-01-021-1383 has 1 manufacturer part number on file: AS8221 (New Hampshire Ball Bearings Inc Div Precision Division).
1 possible match (shared part number, not a government interchangeability claim): 5999-01-461-8731. Verify interchangeability with system specifications before substitution.
Key specifications for AS8221: Seal Type: CONTACT; Seal Location: BOTH ENDS; Alignment Type: RIGID; Bore Diameter: 0.1248 INCHES MINIMUM AND 0.1250 INCHES MAXIMUM IN. 4 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.