The Diaphragm,valve,flat, cataloged under National Stock Number 4810-01-061-8644, 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 8 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4810-01-061-8644 |
| Primary Part Number | 166-838-027 |
| Item Name | Diaphragm,valve,flat |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Manufacturer | Automatic Switch Company Dba Asco |
| Status | ACTIVE |
| Outside Diameter | 3.290 INCHES NOMINAL IN |
| Style Designator | FLAT |
| Material Thickness | 0.035 INCHES NOMINAL IN |
| Bolt Hole Quantity | 4 |
| Bolt Circle Diameter | 3.428 INCHES NOMINAL IN |
| Outside Corner Radius | 0.375 INCHES NOMINAL IN |
| Material | RUBBER SYNTHETIC AND PLASTIC |
| Hole Diameter | 0.3490 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 |
|---|---|
| 166-838-027 PRIMARY | Automatic Switch Company Dba Asco (USA) |
| GV166-838-1 PRIMARY | Automatic Switch Company Dba Asco (USA) |
| 198-970 ITEM 35 | Automatic Switch Company Dba Asco (USA) |
| 166-838-1 | Automatic Switch Company Dba Asco (USA) |
NSN 4810-01-061-8644 is a Diaphragm,valve,flat, manufactured by Automatic Switch Company Dba Asco, classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-01-061-8644 has 4 manufacturer part numbers on file: 166-838-027 (Automatic Switch Company Dba Asco), GV166-838-1 (Automatic Switch Company Dba Asco), 198-970 ITEM 35 (Automatic Switch Company Dba Asco), 166-838-1 (Automatic Switch Company Dba Asco).
Key specifications for 166-838-027: Outside Diameter: 3.290 INCHES NOMINAL IN; Style Designator: FLAT; Material Thickness: 0.035 INCHES NOMINAL IN; Bolt Hole Quantity: 4. 8 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.