The Piston,valve, cataloged under National Stock Number 4810-01-508-9306, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. The manufacturer of record is Automatic Switch Company Dba Asco. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Piston,valve |
| FSC / FSG | 4810 — Valves, Powered (FSG 48) |
| Manufacturers | Automatic Switch Company Dba Asco (CAGE 04845) |
| Parameter | Value |
|---|---|
| NSN | 4810-01-508-9306 |
| Primary Part Number | AV279731-1 ITEM 18 |
| Item Name | Piston,valve |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| 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 |
|---|---|
| AV279731-1 ITEM 18 PRIMARY | Automatic Switch Company Dba Asco (USA) |
| 210964-003 | Automatic Switch Company Dba Asco (USA) |
| Reference | Meaning |
|---|---|
| AV279731 | D/9 Drawing number reference only Automatic Switch Company Dba Asco |
NSN 4810-01-508-9306 is a Piston,valve, manufactured by Automatic Switch Company Dba Asco, classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-01-508-9306 has 2 manufacturer part numbers on file: AV279731-1 ITEM 18 (Automatic Switch Company Dba Asco), 210964-003 (Automatic Switch Company Dba Asco).
2 possible matches (shared part number, not a government interchangeability claim): 4810-01-508-9310, 4810-01-508-9311. 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.