The Ring,rod,piston, cataloged under National Stock Number 3040-01-490-7149, 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 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-490-7149 |
| Primary Part Number | 6985424-14 |
| Item Name | Ring,rod,piston |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Material Document and Classification | ASTM B150, ALLOY C63200 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Material | COPPER ALLOY OVERALL |
| 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 |
|---|---|
| 6985424-14 | Naval Sea Systems Command (USA) |
| 566-6985426-14 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| H621-0102-14 | 3/9 Design control — primary reference U.S. Government activity |
| H6210102A-14 | 3/2 Design control — primary reference U.S. Government activity |
| 6985426 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-490-7149 is a Ring,rod,piston, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-490-7149 has 2 manufacturer part numbers on file: 6985424-14 (Naval Sea Systems Command), 566-6985426-14 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 3040-01-490-7150, 3040-01-695-5401. Verify interchangeability with system specifications before substitution.
Key specifications for 6985424-14: Material Document and Classification: ASTM B150, ALLOY C63200 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Special Features: NEXT HIGHER ASSEMBLY STEERING GEAR HYDRAULIC CYLINDER ASSEMBLY; DRAWING CALLS THIS PART GLAND OUTER. ATTACHES TO CYLINDER HEAD AFT.NEXT HIGHER ASSEMBLY STEERING GEAR HYDRAULIC CYLINDER ASSEMBLY; DRAWING CALLS THIS PART GLAND OUTER. ATTACHES TO CYLINDER HEAD AFT.; End Item Identification: W/S DESIGNATOR LOS ANGELES CLASS SSN (688)W/S DESIGNATOR LOS ANGELES CLASS SSN (688); Material: COPPER ALLOY OVERALL. 2 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.