The Connecting Link,rigid, cataloged under National Stock Number 3040-01-485-6978, 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 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-485-6978 |
| Primary Part Number | 6853521 ITEM NO. 28 |
| Item Name | Connecting Link,rigid |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Body Construction | SOLID |
| Link Style | 90 DEG OFFSET |
| Material Document and Classification | QQ-S-766, CL 304, COND. A FED SPEC SINGLE MATERIAL RESPONSE |
| Material | STEEL CORROSION RESISTING |
| Body Thickness | 0.250 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 |
|---|---|
| 6853521 ITEM NO. 28 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6853521 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-485-6978 is a Connecting Link,rigid, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-485-6978 has 1 manufacturer part number on file: 6853521 ITEM NO. 28 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 3040-01-529-5127. Verify interchangeability with system specifications before substitution.
Key specifications for 6853521 ITEM NO. 28: Body Construction: SOLID; Link Style: 90 DEG OFFSET; Material Document and Classification: QQ-S-766, CL 304, COND. A FED SPEC SINGLE MATERIAL RESPONSE; Overall Length: 2.880 INCHES NOMINAL IN. 5 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.