The Tool,swaging,bearing, cataloged under National Stock Number 5120-01-520-5977, is classified within Federal Supply Class 5120 (Hand Tools, Nonedged, Nonpowered) of the Hand Tools group. The manufacturer of record is Jamaica Bearings Co., Inc. Dba Jamaica Bearings Co., Inc.. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Tool,swaging,bearing |
| FSC / FSG | 5120 — Hand Tools, Nonedged, Nonpowered (FSG 51) |
| Manufacturers | Jamaica Bearings Co., Inc. Dba Jamaica Bearings Co., Inc. (CAGE 04836); J R Potter & Associates Inc (CAGE 0GKW5) |
| Parameter | Value |
|---|---|
| NSN | 5120-01-520-5977 |
| Primary Part Number | RKC4103-10 |
| Item Name | Tool,swaging,bearing |
| FSC / FSG | 5120 / 51 — Hand Tools, Nonedged, Nonpowered |
| Manufacturer | Jamaica Bearings Co., Inc. Dba Jamaica Bearings Co., Inc. |
| Status | ACTIVE |
| 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 |
|---|---|
| RKC4103-10 PRIMARY | Jamaica Bearings Co., Inc. Dba Jamaica Bearings Co., Inc. (USA) |
| RKC4103-10 PRIMARY | J R Potter & Associates Inc (USA) |
| Reference | Meaning |
|---|---|
| 5VG90013-167 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5120-01-520-5977 is a Tool,swaging,bearing, manufactured by Jamaica Bearings Co., Inc. Dba Jamaica Bearings Co., Inc., classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.
NSN 5120-01-520-5977 has 2 manufacturer part numbers on file: RKC4103-10 (Jamaica Bearings Co., Inc. Dba Jamaica Bearings Co., Inc.), RKC4103-10 (J R Potter & Associates Inc).
1 possible match (shared part number, not a government interchangeability claim): 5120-01-521-1292. Verify interchangeability with system specifications before substitution.
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.