The Diaphragm,actuator Valve,special, cataloged under National Stock Number 4810-01-010-9730, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. The manufacturer of record is Automatic Switch Company Dba Asco. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4810-01-010-9730 |
| Primary Part Number | FV166-838-2 |
| Item Name | Diaphragm,actuator Valve,special |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Manufacturer | Automatic Switch Company Dba Asco |
| Status | ACTIVE |
| Bead Diameter | 2.000 INCHES NOMINAL IN |
| Outside Diameter | 3.625 INCHES NOMINAL IN |
| Style Designator | SPECIAL SHAPED |
| Material Thickness | 0.035 INCHES NOMINAL IN |
| Bolt Hole Quantity | 6 |
| Bolt Circle Diameter | 3.750 INCHES NOMINAL IN |
| Outside Corner Radius | 0.312 INCHES NOMINAL IN |
| Material | RUBBER AND STEEL |
| Hole Diameter | 0.345 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 |
|---|---|
| FV166-838-2 PRIMARY | Automatic Switch Company Dba Asco (USA) |
| Reference | Meaning |
|---|---|
| 166-838-29 | C/1 Advisory reference — outside the item-of-supply concept Automatic Switch Company Dba Asco |
| FC166-838-2 | 5/9 Secondary reference Automatic Switch Company Dba Asco |
NSN 4810-01-010-9730 is a Diaphragm,actuator Valve,special, manufactured by Automatic Switch Company Dba Asco, classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-01-010-9730 has 1 manufacturer part number on file: FV166-838-2 (Automatic Switch Company Dba Asco).
Key specifications for FV166-838-2: Overall Height: 0.590 INCHES NOMINAL IN; Bead Diameter: 2.000 INCHES NOMINAL IN; Outside Diameter: 3.625 INCHES NOMINAL IN; Style Designator: SPECIAL SHAPED. 9 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.