The Connecting Link,rigid, cataloged under National Stock Number 3040-01-499-1779, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-499-1779 |
| Primary Part Number | 563-7409374-21 |
| Item Name | Connecting Link,rigid |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Body Diameter | 2.450 INCHES MINIMUM AND 2.455 INCHES MAXIMUM IN |
| Body Construction | SOLID |
| Link Style | EYE TO INTERNAL THREAD |
| Material Document and Classification | ASTM-B150 ALLOY C63200 NATIONAL SPEC SINGLE MATERIAL RESPONSE |
| End Attachment Hole Diameter | 1.004 INCHES MINIMUM AND 1.009 INCHES MAXIMUM FIRST END IN |
| End Attachment Width | 1.238 INCHES MINIMUM AND 1.244 INCHES MAXIMUM FIRST END IN |
| End Attachment Length | 3.310 INCHES NOMINAL FIRST END IN |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| 563-7409374-21 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 563-7409374 | D/9 Drawing number reference only Naval Sea Systems Command |
| B552-3100-21 | 5/2 Secondary reference U.S. Government activity |
NSN 3040-01-499-1779 is a Connecting Link,rigid, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-499-1779 has 1 manufacturer part number on file: 563-7409374-21 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 3120-01-499-4141, 3120-01-499-4146. Verify interchangeability with system specifications before substitution.
Key specifications for 563-7409374-21: Body Diameter: 2.450 INCHES MINIMUM AND 2.455 INCHES MAXIMUM IN; Body Construction: SOLID; Link Style: EYE TO INTERNAL THREAD; Material Document and Classification: ASTM-B150 ALLOY C63200 NATIONAL SPEC SINGLE MATERIAL RESPONSE. 8 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.