The Collar,shaft, cataloged under National Stock Number 3040-01-221-4331, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Huntington Ingalls Incorporated Div Ingalls Shipbuilding. Government technical data includes 11 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-221-4331 |
| Primary Part Number | 2278771 PIECE 8A |
| Item Name | Collar,shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Huntington Ingalls Incorporated Div Ingalls Shipbuilding |
| Status | ACTIVE |
| Securing Hole Type and Location | THREADED ALL HOLES |
| Style Designator | PLAIN ROUND |
| Material Document and Classification | QQ-C-465, ALLOY 642 FED SPEC SINGLE MATERIAL RESPONSE |
| Screw Thread Series Designator and Location | ALL HOLES UNIFIED NATIONAL COARSE (UNC) |
| Outside Diameter | 5.5000 INCHES NOMINAL IN |
| Nominal Thread Size | 0.500 INCHES ALL HOLES IN |
| Angle Between Centerlines of Securing Holes in Deg | 180.0 |
| Securing Hole Quantity | 2 |
| Bore Diameter | 4.2550 INCHES NOMINAL IN |
| Material | COPPER ALLOY 642 |
| Thickness | 1.2500 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 |
|---|---|
| 2278771 PIECE 8A PRIMARY | Huntington Ingalls Incorporated Div Ingalls Shipbuilding (USA) |
NSN 3040-01-221-4331 is a Collar,shaft, manufactured by Huntington Ingalls Incorporated Div Ingalls Shipbuilding, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-221-4331 has 1 manufacturer part number on file: 2278771 PIECE 8A (Huntington Ingalls Incorporated Div Ingalls Shipbuilding).
Key specifications for 2278771 PIECE 8A: Securing Hole Type and Location: THREADED ALL HOLES; Style Designator: PLAIN ROUND; Material Document and Classification: QQ-C-465, ALLOY 642 FED SPEC SINGLE MATERIAL RESPONSE; Screw Thread Series Designator and Location: ALL HOLES UNIFIED NATIONAL COARSE (UNC). 11 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.