The Ring,piston, cataloged under National Stock Number 3040-00-287-4563, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Automatic Switch Company Dba Asco. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Ring,piston |
| FSC / FSG | 3040 — Miscellaneous Power Transmission Equipment (FSG 30) |
| Manufacturers | Automatic Switch Company Dba Asco (CAGE 04845) |
| Parameter | Value |
|---|---|
| NSN | 3040-00-287-4563 |
| Primary Part Number | 26-060-5 |
| Item Name | Ring,piston |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Automatic Switch Company Dba Asco |
| Status | ACTIVE |
| 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 |
|---|---|
| 26-060-5 PRIMARY | Automatic Switch Company Dba Asco (USA) |
| Reference | Meaning |
|---|---|
| FV26-060 | D/9 Drawing number reference only Automatic Switch Company Dba Asco |
| 3127757 | 5/9 Secondary reference Naval Sea Systems Command |
| FV26-060-5 | 5/9 Secondary reference Automatic Switch Company Dba Asco |
| 3127757 | 5/2 Secondary reference U.S. Government activity |
NSN 3040-00-287-4563 is a Ring,piston, manufactured by Automatic Switch Company Dba Asco, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-287-4563 has 1 manufacturer part number on file: 26-060-5 (Automatic Switch Company Dba Asco).
1 possible match (shared part number, not a government interchangeability claim): 5950-01-531-9897. Verify interchangeability with system specifications before substitution.
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.