The Collar,shaft, cataloged under National Stock Number 3040-01-388-5303, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Barnes Group Inc. Dba Barnes Distribution. Government technical data includes 3 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 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 | 3040-01-388-5303 |
| Primary Part Number | 30879 |
| Item Name | Collar,shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Barnes Group Inc. Dba Barnes Distribution |
| Status | ACTIVE |
| Outside Diameter | 2.062 INCHES NOMINAL IN |
| Bore Diameter | 1.2500 INCHES NOMINAL IN |
| Material | STEEL |
| 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 |
|---|---|
| 30879 PRIMARY | Barnes Group Inc. Dba Barnes Distribution (USA) |
NSN 3040-01-388-5303 is a Collar,shaft, manufactured by Barnes Group Inc. Dba Barnes Distribution, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-388-5303 has 1 manufacturer part number on file: 30879 (Barnes Group Inc. Dba Barnes Distribution).
1 possible match (shared part number, not a government interchangeability claim): 1005-01-688-8510. Verify interchangeability with system specifications before substitution.
Key specifications for 30879: Outside Diameter: 2.062 INCHES NOMINAL IN; Special Features: TWO PIECE COLLAR; Bore Diameter: 1.2500 INCHES NOMINAL IN; Material: STEEL. 3 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.