The Collar,shaft, cataloged under National Stock Number 3040-00-540-1684, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Mcneil Ohio Corp. Government technical data includes 9 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-00-540-1684 |
| Primary Part Number | 154256 |
| Item Name | Collar,shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Mcneil Ohio Corp |
| Status | ACTIVE |
| Securing Hole Type and Location | THREADED SINGLE HOLE |
| Style Designator | PLAIN ROUND |
| Screw Thread Series Designator and Location | SINGLE HOLE UNIFIED NATIONAL COARSE (UNC) |
| Outside Diameter | 1.125 INCHES NOMINAL IN |
| Nominal Thread Size | 0.250 INCHES SINGLE HOLE IN |
| Securing Hole Quantity | 1 |
| Bore Diameter | 0.6280 INCHES NOMINAL IN |
| Material | STEEL |
| Thickness | 0.500 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 |
|---|---|
| 154256 PRIMARY | Mcneil Ohio Corp (USA) |
| Reference | Meaning |
|---|---|
| 150-442GPC670-675 | 5/9 Secondary reference Hardie-Tynes Co., Inc. |
| 150-442KPC670-675 | 5/9 Secondary reference Hardie-Tynes Co., Inc. |
| 390014PC670-675 | 5/9 Secondary reference U.S. Government activity |
NSN 3040-00-540-1684 is a Collar,shaft, manufactured by Mcneil Ohio Corp, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-540-1684 has 1 manufacturer part number on file: 154256 (Mcneil Ohio Corp).
1 possible match (shared part number, not a government interchangeability claim): 5305-00-736-8549. Verify interchangeability with system specifications before substitution.
Key specifications for 154256: Securing Hole Type and Location: THREADED SINGLE HOLE; Style Designator: PLAIN ROUND; Screw Thread Series Designator and Location: SINGLE HOLE UNIFIED NATIONAL COARSE (UNC); Outside Diameter: 1.125 INCHES NOMINAL IN. 9 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.