The Collar,shaft, cataloged under National Stock Number 3040-01-123-3845, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-123-3845 |
| Item Name | Collar,shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Securing Hole Type and Location | UNTHREADED SINGLE HOLE |
| Style Designator | PLAIN ROUND |
| Material Document and Classification | QQ-N-281, CLASS A FED SPEC SINGLE MATERIAL RESPONSE |
| Outside Diameter | 2.000 INCHES NOMINAL IN |
| Hole Diameter and Location | 0.2810 INCHES NOMINAL SINGLE HOLE IN |
| Securing Hole Quantity | 1 |
| Bore Diameter | 1.2450 INCHES NOMINAL IN |
| Material | NICKEL ALLOY 400 |
| 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 |
| Reference | Meaning |
|---|---|
| 87615-2011 | D/9 Drawing number reference only U.S. Government activity |
| 520-4674729 ITEM 4 | 3/2 Design control — primary reference U.S. Government activity |
| 520-4674729 | D/9 Drawing number reference only U.S. Government activity |
| 87615-2011 ITEM 4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-123-3845 is a Collar,shaft, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 2520-01-123-4102, 3040-01-123-8844, 3040-01-124-3788. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-123-3845: Securing Hole Type and Location: UNTHREADED SINGLE HOLE; Style Designator: PLAIN ROUND; Material Document and Classification: QQ-N-281, CLASS A FED SPEC SINGLE MATERIAL RESPONSE; Outside Diameter: 2.000 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.